variations_service.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/metrics/variations/variations_service.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <set> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base64.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/build_time.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/field_trial.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 15868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/metrics/sparse_histogram.h" 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_registry_simple.h" 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_service.h" 187dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#include "base/sha1.h" 197dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#include "base/strings/string_number_conversions.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/version.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/browser_process.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/metrics/proto/trials_seed.pb.h" 23c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "chrome/browser/net/network_time_tracker.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/chrome_switches.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/metrics/variations/variations_util.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/pref_names.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/browser_thread.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/common/url_fetcher.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/load_flags.h" 30868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "net/base/net_errors.h" 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/network_change_notifier.h" 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/url_util.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/http/http_response_headers.h" 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/http/http_status_code.h" 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/http/http_util.h" 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/url_request/url_fetcher.h" 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/url_request/url_request_status.h" 38eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "url/gurl.h" 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 40c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_CHROMEOS) 41c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "chrome/browser/chromeos/settings/cros_settings.h" 42c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 43c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace chrome_variations { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Default server of Variations seed info. 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char kDefaultVariationsServerURL[] = 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "https://clients4.google.com/chrome-variations/seed"; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int kMaxRetrySeedFetch = 5; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// TODO(mad): To be removed when we stop updating the NetworkTimeTracker. 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// For the HTTP date headers, the resolution of the server time is 1 second. 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const int64 kServerTimeResolutionMs = 1000; 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Maps Study_Channel enum values to corresponding chrome::VersionInfo::Channel 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// enum values. 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)chrome::VersionInfo::Channel ConvertStudyChannelToVersionChannel( 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Study_Channel study_channel) { 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (study_channel) { 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Study_Channel_CANARY: 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return chrome::VersionInfo::CHANNEL_CANARY; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Study_Channel_DEV: 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return chrome::VersionInfo::CHANNEL_DEV; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Study_Channel_BETA: 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return chrome::VersionInfo::CHANNEL_BETA; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Study_Channel_STABLE: 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return chrome::VersionInfo::CHANNEL_STABLE; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // All enum values of |study_channel| were handled above. 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return chrome::VersionInfo::CHANNEL_UNKNOWN; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Wrapper around channel checking, used to enable channel mocking for 772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// testing. If the current browser channel is not UNKNOWN, this will return 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// that channel value. Otherwise, if the fake channel flag is provided, this 792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// will return the fake channel. Failing that, this will return the UNKNOWN 802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// channel. 812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)chrome::VersionInfo::Channel GetChannelForVariations() { 822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel(); 832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (channel != chrome::VersionInfo::CHANNEL_UNKNOWN) 842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return channel; 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string forced_channel = 862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CommandLine::ForCurrentProcess()->GetSwitchValueASCII( 872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) switches::kFakeVariationsChannel); 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (forced_channel == "stable") 892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) channel = chrome::VersionInfo::CHANNEL_STABLE; 902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else if (forced_channel == "beta") 912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) channel = chrome::VersionInfo::CHANNEL_BETA; 922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else if (forced_channel == "dev") 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) channel = chrome::VersionInfo::CHANNEL_DEV; 942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else if (forced_channel == "canary") 952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) channel = chrome::VersionInfo::CHANNEL_CANARY; 962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else 972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DVLOG(1) << "Invalid channel provided: " << forced_channel; 982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return channel; 992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Study_Platform GetCurrentPlatform() { 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Study_Platform_PLATFORM_WINDOWS; 10490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)#elif defined(OS_IOS) 10590dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return Study_Platform_PLATFORM_IOS; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_MACOSX) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Study_Platform_PLATFORM_MAC; 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_CHROMEOS) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Study_Platform_PLATFORM_CHROMEOS; 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_ANDROID) 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Study_Platform_PLATFORM_ANDROID; 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Default BSD and SOLARIS to Linux to not break those builds, although these 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // platforms are not officially supported by Chrome. 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Study_Platform_PLATFORM_LINUX; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#error Unknown platform 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 121c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Returns a string that will be used for the value of the 'osname' URL param 122c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// to the variations server. 123c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)std::string GetPlatformString() { 124c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_WIN) 125c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "win"; 12690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)#elif defined(OS_IOS) 12790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return "ios"; 128c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_MACOSX) 129c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "mac"; 130c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_CHROMEOS) 131c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "chromeos"; 132c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_ANDROID) 133c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "android"; 134c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS) 135c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Default BSD and SOLARIS to Linux to not break those builds, although these 136c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // platforms are not officially supported by Chrome. 137c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "linux"; 138c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#else 139c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#error Unknown platform 140c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 141c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 142c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Converts |date_time| in Study date format to base::Time. 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Time ConvertStudyDateToBaseTime(int64 date_time) { 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Time::UnixEpoch() + base::TimeDelta::FromSeconds(date_time); 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 148c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Gets the restrict parameter from |local_state| or from Chrome OS settings in 149c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// the case of that platform. 150c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)std::string GetRestrictParameterPref(PrefService* local_state) { 151c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) std::string parameter; 152c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_CHROMEOS) 153c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) chromeos::CrosSettings::Get()->GetString( 154c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) chromeos::kVariationsRestrictParameter, ¶meter); 155c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#else 156c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (local_state) 157c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) parameter = local_state->GetString(prefs::kVariationsRestrictParameter); 158c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 159c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return parameter; 160c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 161c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1627dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch// Computes a hash of the serialized variations seed data. 1637dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochstd::string HashSeed(const std::string& seed_data) { 1647dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string sha1 = base::SHA1HashString(seed_data); 1657dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch return base::HexEncode(sha1.data(), sha1.size()); 1667dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 1677dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 168868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)enum ResourceRequestsAllowedState { 169868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED, 170868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_NOT_ALLOWED, 171868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_NOTIFIED, 172868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_ENUM_SIZE, 173868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)}; 174868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 175868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)// Records UMA histogram with the current resource requests allowed state. 176868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)void RecordRequestsAllowedHistogram(ResourceRequestsAllowedState state) { 177868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_ENUMERATION("Variations.ResourceRequestsAllowed", state, 178868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_ENUM_SIZE); 179868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)} 180868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 1817dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochenum VariationSeedEmptyState { 1827dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_NOT_EMPTY, 1837dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY, 1847dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_CORRUPT, 1857dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY_ENUM_SIZE, 1867dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch}; 1877dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1887dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochvoid RecordVariationSeedEmptyHistogram(VariationSeedEmptyState state) { 1897dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch UMA_HISTOGRAM_ENUMERATION("Variations.SeedEmpty", state, 1907dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY_ENUM_SIZE); 1917dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 1927dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)VariationsService::VariationsService(PrefService* local_state) 1962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : local_state_(local_state), 1972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) variations_server_url_(GetVariationsServerURL(local_state)), 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_(false), 1997d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_(false), 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_( 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new ResourceRequestAllowedNotifier) { 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_->Init(this); 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)VariationsService::VariationsService(ResourceRequestAllowedNotifier* notifier, 206c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) PrefService* local_state) 207c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) : local_state_(local_state), 2082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) variations_server_url_(GetVariationsServerURL(NULL)), 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_(false), 2107d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_(false), 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_(notifier) { 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_->Init(this); 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)VariationsService::~VariationsService() { 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)bool VariationsService::CreateTrialsFromSeed() { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_ = true; 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrialsSeed seed; 2227dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (!LoadTrialsSeedFromPref(&seed)) 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int64 date_value = local_state_->GetInt64(prefs::kVariationsSeedDate); 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time seed_date = base::Time::FromInternalValue(date_value); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time build_time = base::GetBuildTime(); 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use the build time for date checks if either the seed date is invalid or 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the build time is newer than the seed date. 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Time reference_date = seed_date; 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (seed_date.is_null() || seed_date < build_time) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reference_date = build_time; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const chrome::VersionInfo current_version_info; 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!current_version_info.is_valid()) 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) chrome::VersionInfo::Channel channel = GetChannelForVariations(); 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < seed.study_size(); ++i) { 2402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (ShouldAddStudy(seed.study(i), current_version_info, reference_date, 2412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) channel)) { 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CreateTrialFromStudy(seed.study(i), reference_date); 2432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Log the "freshness" of the seed that was just used. The freshness is the 2472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // time between the last successful seed download and now. 2482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int64 last_fetch_time_internal = 2492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) local_state_->GetInt64(prefs::kVariationsLastFetchTime); 2502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (last_fetch_time_internal) { 2512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::Time now = base::Time::Now(); 2522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::TimeDelta delta = 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) now - base::Time::FromInternalValue(last_fetch_time_internal); 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Log the value in number of minutes. 2552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) UMA_HISTOGRAM_CUSTOM_COUNTS("Variations.SeedFreshness", delta.InMinutes(), 2562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1, base::TimeDelta::FromDays(30).InMinutes(), 50); 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::StartRepeatedVariationsSeedFetch() { 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Check that |CreateTrialsFromSeed| was called, which is necessary to 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // retrieve the serial number that will be sent to the server. 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(create_trials_from_seed_called_); 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 269c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(!request_scheduler_.get()); 270c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Note that the act of instantiating the scheduler will start the fetch, if 271c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // the scheduler deems appropriate. Using Unretained is fine here since the 272c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // lifespan of request_scheduler_ is guaranteed to be shorter than that of 273c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // this service. 274c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_.reset(VariationsRequestScheduler::Create( 275c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::Bind(&VariationsService::FetchVariationsSeed, 276c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::Unretained(this)), local_state_)); 277c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_->Start(); 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)GURL VariationsService::GetVariationsServerURL(PrefService* local_state) { 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string server_url_string(CommandLine::ForCurrentProcess()-> 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GetSwitchValueASCII(switches::kVariationsServerURL)); 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (server_url_string.empty()) 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) server_url_string = kDefaultVariationsServerURL; 2862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GURL server_url = GURL(server_url_string); 287c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 288c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const std::string restrict_param = GetRestrictParameterPref(local_state); 289c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (!restrict_param.empty()) { 290c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) server_url = net::AppendOrReplaceQueryParameter(server_url, 291c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) "restrict", 292c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) restrict_param); 2932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 294c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 295c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) server_url = net::AppendOrReplaceQueryParameter(server_url, "osname", 296c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) GetPlatformString()); 297c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 2982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(server_url.is_valid()); 2992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return server_url; 3002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) 3032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::StartGoogleUpdateRegistrySync() { 3042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry_syncer_.RequestRegistrySync(); 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::SetCreateTrialsFromSeedCalledForTesting(bool called) { 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_ = called; 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)std::string VariationsService::GetDefaultVariationsServerURLForTesting() { 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return kDefaultVariationsServerURL; 3152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 3182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::RegisterPrefs(PrefRegistrySimple* registry) { 3192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterStringPref(prefs::kVariationsSeed, std::string()); 3207dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch registry->RegisterStringPref(prefs::kVariationsSeedHash, std::string()); 3212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterInt64Pref(prefs::kVariationsSeedDate, 3222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time().ToInternalValue()); 3232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterInt64Pref(prefs::kVariationsLastFetchTime, 0); 3242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterStringPref(prefs::kVariationsRestrictParameter, 3252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string()); 3262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 3292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)VariationsService* VariationsService::Create(PrefService* local_state) { 330c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if !defined(GOOGLE_CHROME_BUILD) 3312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Unless the URL was provided, unsupported builds should return NULL to 3322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // indicate that the service should not be used. 3332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!CommandLine::ForCurrentProcess()->HasSwitch( 334b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) switches::kVariationsServerURL)) { 335b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) DVLOG(1) << "Not creating VariationsService in unofficial build without --" 336b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) << switches::kVariationsServerURL << " specified."; 3372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return NULL; 338b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 3392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 3402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return new VariationsService(local_state); 3412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::DoActualFetch() { 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_.reset(net::URLFetcher::Create( 3452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 0, variations_server_url_, net::URLFetcher::GET, this)); 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES | 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_SAVE_COOKIES); 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->SetRequestContext( 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_browser_process->system_request_context()); 3502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pending_seed_request_->SetMaxRetriesOn5xx(kMaxRetrySeedFetch); 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!variations_serial_number_.empty()) { 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->AddExtraRequestHeader("If-Match:" + 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_); 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->Start(); 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 357868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const base::TimeTicks now = base::TimeTicks::Now(); 358868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) base::TimeDelta time_since_last_fetch; 359868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // Record a time delta of 0 (default value) if there was no previous fetch. 360868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (!last_request_started_time_.is_null()) 361868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) time_since_last_fetch = now - last_request_started_time_; 362868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_CUSTOM_COUNTS("Variations.TimeSinceLastFetchAttempt", 363868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) time_since_last_fetch.InMinutes(), 0, 364868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) base::TimeDelta::FromDays(7).InMinutes(), 50); 365868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) last_request_started_time_ = now; 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::FetchVariationsSeed() { 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!resource_request_allowed_notifier_->ResourceRequestsAllowed()) { 372868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_NOT_ALLOWED); 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Resource requests were not allowed. Waiting for notification."; 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 377868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_ALLOWED); 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoActualFetch(); 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::OnURLFetchComplete(const net::URLFetcher* source) { 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(pending_seed_request_.get(), source); 3837d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 3847d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) const bool is_first_request = !initial_request_completed_; 3857d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_ = true; 3867d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The fetcher will be deleted when the request is handled. 3882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<const net::URLFetcher> request(pending_seed_request_.release()); 389868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const net::URLRequestStatus& request_status = request->GetStatus(); 390868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (request_status.status() != net::URLRequestStatus::SUCCESS) { 391868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_SPARSE_SLOWLY("Variations.FailedRequestErrorCode", 392868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) -request_status.error()); 393868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) DVLOG(1) << "Variations server request failed with error: " 394868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) << request_status.error() << ": " 395868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) << net::ErrorToString(request_status.error()); 3967d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // It's common for the very first fetch attempt to fail (e.g. the network 3977d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // may not yet be available). In such a case, try again soon, rather than 3987d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // waiting the full time interval. 3997d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) if (is_first_request) 4007d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) request_scheduler_->ScheduleFetchShortly(); 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Log the response code. 4052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int response_code = request->GetResponseCode(); 406868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_SPARSE_SLOWLY("Variations.SeedFetchResponseCode", 407868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) response_code); 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::TimeDelta latency = 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks::Now() - last_request_started_time_; 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time response_date; 4132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code == net::HTTP_OK || 4142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) response_code == net::HTTP_NOT_MODIFIED) { 4152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool success = request->GetResponseHeaders()->GetDateValue(&response_date); 4162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(success || response_date.is_null()); 4172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!response_date.is_null()) { 419c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) NetworkTimeTracker::BuildNotifierUpdateCallback().Run( 4202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) response_date, 4212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::TimeDelta::FromMilliseconds(kServerTimeResolutionMs), 4222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) latency); 4232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code != net::HTTP_OK) { 4272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DVLOG(1) << "Variations server request returned non-HTTP_OK response code: " 4282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << response_code; 4292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code == net::HTTP_NOT_MODIFIED) { 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchNotModifiedLatency", latency); 4312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) RecordLastFetchTime(); 4322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } else { 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchOtherLatency", latency); 4342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchSuccessLatency", latency); 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string seed_data; 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool success = request->GetResponseAsString(&seed_data); 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(success); 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4437dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch StoreSeedData(seed_data, response_date); 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::OnResourceRequestsAllowed() { 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Note that this only attempts to fetch the seed at most once per period 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (kSeedFetchPeriodHours). This works because 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |resource_request_allowed_notifier_| only calls this method if an 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // attempt was made earlier that fails (which implies that the period had 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // elapsed). After a successful attempt is made, the notifier will know not 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to call this method again until another failed attempt occurs. 453868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_ALLOWED_NOTIFIED); 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Retrying fetch."; 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoActualFetch(); 456c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 457c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // This service must have created a scheduler in order for this to be called. 458c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(request_scheduler_.get()); 459c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_->Reset(); 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::StoreSeedData(const std::string& seed_data, 4637dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const base::Time& seed_date) { 4642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (seed_data.empty()) { 4652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VLOG(1) << "Variations Seed data from server is empty, rejecting the seed."; 4662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 4672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Only store the seed data if it parses correctly. 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrialsSeed seed; 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!seed.ParseFromString(seed_data)) { 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG(1) << "Variations Seed data from server is not in valid proto format, " 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "rejecting the seed."; 4745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string base64_seed_data; 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!base::Base64Encode(seed_data, &base64_seed_data)) { 4795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG(1) << "Variations Seed data from server fails Base64Encode, rejecting " 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "the seed."; 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4847dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetString(prefs::kVariationsSeed, base64_seed_data); 4857dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetString(prefs::kVariationsSeedHash, HashSeed(seed_data)); 4867dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetInt64(prefs::kVariationsSeedDate, 4877dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch seed_date.ToInternalValue()); 4885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_ = seed.serial_number(); 4892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) RecordLastFetchTime(); 4912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 4965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::ShouldAddStudy( 4975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study& study, 4985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const chrome::VersionInfo& version_info, 4992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::Time& reference_date, 5002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const chrome::VersionInfo::Channel channel) { 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.has_filter()) { 5022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!CheckStudyChannel(study.filter(), channel)) { 5035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Filtered out study " << study.name() << " due to channel."; 5045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CheckStudyLocale(study.filter(), 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_browser_process->GetApplicationLocale())) { 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Filtered out study " << study.name() << " due to locale."; 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CheckStudyPlatform(study.filter(), GetCurrentPlatform())) { 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Filtered out study " << study.name() << " due to platform."; 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CheckStudyVersion(study.filter(), version_info.Version())) { 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Filtered out study " << study.name() << " due to version."; 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!CheckStudyStartDate(study.filter(), reference_date)) { 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Filtered out study " << study.name() << 5255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) " due to start date."; 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Kept study " << study.name() << "."; 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 5355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::CheckStudyChannel( 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study_Filter& filter, 5375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) chrome::VersionInfo::Channel channel) { 5385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // An empty channel list matches all channels. 5395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.channel_size() == 0) 5405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < filter.channel_size(); ++i) { 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ConvertStudyChannelToVersionChannel(filter.channel(i)) == channel) 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::CheckStudyLocale( 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const chrome_variations::Study_Filter& filter, 5525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& locale) { 5535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // An empty locale list matches all locales. 5545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.locale_size() == 0) 5555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < filter.locale_size(); ++i) { 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.locale(i) == locale) 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 5655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::CheckStudyPlatform( 5665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study_Filter& filter, 5675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Study_Platform platform) { 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // An empty platform list matches all platforms. 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.platform_size() == 0) 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < filter.platform_size(); ++i) { 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.platform(i) == platform) 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 5805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::CheckStudyVersion( 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study_Filter& filter, 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& version_string) { 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Version version(version_string); 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!version.IsValid()) { 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.has_min_version()) { 5905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (version.CompareToWildcardString(filter.min_version()) < 0) 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.has_max_version()) { 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (version.CompareToWildcardString(filter.max_version()) > 0) 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::CheckStudyStartDate( 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study_Filter& filter, 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time& date_time) { 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (filter.has_start_date()) { 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time start_date = 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ConvertStudyDateToBaseTime(filter.start_date()); 6095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return date_time >= start_date; 6105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 6135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::IsStudyExpired(const Study& study, 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time& date_time) { 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.has_expiry_date()) { 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time expiry_date = 6195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ConvertStudyDateToBaseTime(study.expiry_date()); 6205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return date_time >= expiry_date; 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 6275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::ValidateStudyAndComputeTotalProbability( 6285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study& study, 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FieldTrial::Probability* total_probability) { 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // At the moment, a missing default_experiment_name makes the study invalid. 6315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.default_experiment_name().empty()) { 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " has no default experiment defined."; 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.filter().has_min_version() && 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !Version::IsValidWildcardString(study.filter().min_version())) { 6375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " has invalid min version: " 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << study.filter().min_version(); 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.filter().has_max_version() && 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !Version::IsValidWildcardString(study.filter().max_version())) { 6435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " has invalid max version: " 6445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << study.filter().max_version(); 6455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& default_group_name = study.default_experiment_name(); 6495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FieldTrial::Probability divisor = 0; 6505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool found_default_group = false; 6525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::set<std::string> experiment_names; 6535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < study.experiment_size(); ++i) { 6545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.experiment(i).name().empty()) { 6555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " is missing experiment " << i << " name"; 6565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!experiment_names.insert(study.experiment(i).name()).second) { 6595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " has a repeated experiment name " 6605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << study.experiment(i).name(); 6615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 66390dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) 66490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) if (!study.experiment(i).has_forcing_flag()) 66590dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) divisor += study.experiment(i).probability_weight(); 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.experiment(i).name() == default_group_name) 6675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) found_default_group = true; 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!found_default_group) { 6715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << study.name() << " is missing default experiment in its " 6725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "experiment list"; 6735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The default group was not found in the list of groups. This study is not 6745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // valid. 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *total_probability = divisor; 6795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6827dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochbool VariationsService::LoadTrialsSeedFromPref(TrialsSeed* seed) { 6837dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string base64_seed_data = 6847dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->GetString(prefs::kVariationsSeed); 6857dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (base64_seed_data.empty()) { 6867dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_EMPTY); 6872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 6887dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6907dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string hash_from_pref = 6917dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->GetString(prefs::kVariationsSeedHash); 6922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the decode process fails, assume the pref value is corrupt and clear it. 6932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string seed_data; 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!base::Base64Decode(base64_seed_data, &seed_data) || 6957dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch (!hash_from_pref.empty() && HashSeed(seed_data) != hash_from_pref) || 6965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !seed->ParseFromString(seed_data)) { 6977dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VLOG(1) << "Variations seed data in local pref is corrupt, clearing the " 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "pref."; 6997dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeed); 7007dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeedDate); 7017dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeedHash); 7027dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_CORRUPT); 7035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 7045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_ = seed->serial_number(); 7067dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_NOT_EMPTY); 7075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 7085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::CreateTrialFromStudy(const Study& study, 7115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time& reference_date) { 7125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FieldTrial::Probability total_probability = 0; 7135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!ValidateStudyAndComputeTotalProbability(study, &total_probability)) 7145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 7155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 71690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) // Check if any experiments need to be forced due to a command line 71790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) // flag. Force the first experiment with an existing flag. 71890dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) CommandLine* command_line = CommandLine::ForCurrentProcess(); 71990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) for (int i = 0; i < study.experiment_size(); ++i) { 72090dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) const Study_Experiment& experiment = study.experiment(i); 72190dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) if (experiment.has_forcing_flag() && 72290dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) command_line->HasSwitch(experiment.forcing_flag())) { 72390dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) base::FieldTrialList::CreateFieldTrial(study.name(), experiment.name()); 72490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) DVLOG(1) << "Trial " << study.name() << " forced by flag: " 72590dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) << experiment.forcing_flag(); 72690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return; 72790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) } 72890dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) } 72990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) 7305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The trial is created without specifying an expiration date because the 7315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // expiration check in field_trial.cc is based on the build date. Instead, 7325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the expiration check using |reference_date| is done explicitly below. 7335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<base::FieldTrial> trial( 7345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FieldTrialList::FactoryGetFieldTrial( 7355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) study.name(), total_probability, study.default_experiment_name(), 7362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::FieldTrialList::kNoExpirationYear, 1, 1, NULL)); 7375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (study.has_consistency() && 7395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) study.consistency() == Study_Consistency_PERMANENT) { 740c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (study.has_randomization_seed()) 741c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) trial->UseOneTimeRandomizationWithCustomSeed(study.randomization_seed()); 742c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) else 743c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) trial->UseOneTimeRandomization(); 7445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < study.experiment_size(); ++i) { 7475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Study_Experiment& experiment = study.experiment(i); 7487dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 7497dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch std::map<std::string, std::string> params; 7507dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch for (int j = 0; j < experiment.param_size(); j++) { 7517dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (experiment.param(j).has_name() && experiment.param(j).has_value()) 7527dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch params[experiment.param(j).name()] = experiment.param(j).value(); 7537dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 7547dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (!params.empty()) 7557dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch AssociateVariationParams(study.name(), experiment.name(), params); 7567dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 75790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) // Groups with flags can't be selected randomly, so we don't add them to 75890dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) // the field trial. 75990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) if (experiment.has_forcing_flag()) 76090dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) continue; 76190dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) 7625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (experiment.name() != study.default_experiment_name()) 7635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) trial->AppendGroup(experiment.name(), experiment.probability_weight()); 7645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (experiment.has_google_web_experiment_id()) { 7662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const VariationID variation_id = 7672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static_cast<VariationID>(experiment.google_web_experiment_id()); 7682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AssociateGoogleVariationIDForce(GOOGLE_WEB_PROPERTIES, 7692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) study.name(), 7702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) experiment.name(), 7712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) variation_id); 7722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 7732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (experiment.has_google_update_experiment_id()) { 7745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const VariationID variation_id = 7752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static_cast<VariationID>(experiment.google_update_experiment_id()); 7762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AssociateGoogleVariationIDForce(GOOGLE_UPDATE_SERVICE, 7772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) study.name(), 7785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) experiment.name(), 7795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variation_id); 7805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) trial->SetForced(); 7845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IsStudyExpired(study, reference_date)) 7855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) trial->Disable(); 7865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::RecordLastFetchTime() { 7892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // local_state_ is NULL in tests, so check it first. 7902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (local_state_) { 7912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) local_state_->SetInt64(prefs::kVariationsLastFetchTime, 7922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time::Now().ToInternalValue()); 7932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 7942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 7952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 7965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace chrome_variations 797