net_pref_observer.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/net/net_pref_observer.h"
6
7#include "base/prefs/pref_service.h"
8#include "chrome/browser/net/predictor.h"
9#include "chrome/browser/prerender/prerender_manager.h"
10#include "chrome/common/chrome_notification_types.h"
11#include "chrome/common/pref_names.h"
12#include "components/user_prefs/pref_registry_syncable.h"
13#include "content/public/browser/browser_thread.h"
14#include "net/http/http_stream_factory.h"
15
16using content::BrowserThread;
17
18NetPrefObserver::NetPrefObserver(PrefService* prefs,
19                                 prerender::PrerenderManager* prerender_manager,
20                                 chrome_browser_net::Predictor* predictor)
21    : prerender_manager_(prerender_manager),
22      predictor_(predictor) {
23  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
24  DCHECK(prefs);
25  DCHECK(predictor);
26
27  base::Closure prefs_callback = base::Bind(&NetPrefObserver::ApplySettings,
28                                            base::Unretained(this));
29  network_prediction_enabled_.Init(prefs::kNetworkPredictionEnabled, prefs,
30                                   prefs_callback);
31  spdy_disabled_.Init(prefs::kDisableSpdy, prefs, prefs_callback);
32
33  ApplySettings();
34}
35
36NetPrefObserver::~NetPrefObserver() {
37  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
38}
39
40void NetPrefObserver::ApplySettings() {
41  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
42
43  predictor_->EnablePredictor(*network_prediction_enabled_);
44  if (prerender_manager_)
45    prerender_manager_->set_enabled(*network_prediction_enabled_);
46  if (spdy_disabled_.IsManaged())
47    net::HttpStreamFactory::set_spdy_enabled(!*spdy_disabled_);
48}
49
50// static
51void NetPrefObserver::RegisterUserPrefs(
52    user_prefs::PrefRegistrySyncable* registry) {
53  registry->RegisterBooleanPref(
54      prefs::kNetworkPredictionEnabled,
55      true,
56      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
57  registry->RegisterBooleanPref(
58      prefs::kDisableSpdy,
59      false,
60      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
61}
62