158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch// Copyright (c) 2013 The Chromium Authors. All rights reserved. 258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch// Use of this source code is governed by a BSD-style license that can be 358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch// found in the LICENSE file. 458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ 658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ 758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include <string> 958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "base/basictypes.h" 114e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)#include "base/callback_forward.h" 1258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "base/files/file_path.h" 134e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)#include "base/gtest_prod_util.h" 144e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)#include "base/memory/ref_counted.h" 154e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)#include "base/memory/scoped_ptr.h" 1658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "base/memory/weak_ptr.h" 174e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)#include "base/sequenced_task_runner.h" 1858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "chrome/browser/extensions/updater/extension_downloader_delegate.h" 1958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "content/public/browser/notification_observer.h" 2058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "content/public/browser/notification_registrar.h" 2158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 2258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochnamespace base { 2358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochclass DictionaryValue; 2458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch} 2558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 2658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochnamespace extensions { 2758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochclass ExtensionDownloader; 2858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch} 2958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 3058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochnamespace net { 3158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochclass URLRequestContextGetter; 3258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch} 3358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 3458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochnamespace chromeos { 3558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 364e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)// The ExternalCache manages a cache for external extensions. 3758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdochclass ExternalCache : public content::NotificationObserver, 3858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch public extensions::ExtensionDownloaderDelegate { 3958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch public: 4058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch class Delegate { 4158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch public: 4258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual ~Delegate() {} 4358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Caller owns |prefs|. 4458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual void OnExtensionListsUpdated( 4558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const base::DictionaryValue* prefs) = 0; 461e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 471e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Cache needs to provide already installed extensions otherwise they 481e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // will be removed. Cache calls this function to get version of installed 491e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // extension or empty string if not installed. 501e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) virtual std::string GetInstalledExtensionVersion(const std::string& id); 5158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch }; 5258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 534e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // The |request_context| is used for update checks. All file I/O is done via 544e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // the |backend_task_runner|. If |always_check_updates| is |false|, update 554e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // checks are performed for extensions that have an |external_update_url| 564e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // only. If |wait_for_cache_initialization| is |true|, the cache contents will 574e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // not be read until a flag file appears in the cache directory, signaling 584e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // that the cache is ready. 594e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) ExternalCache(const base::FilePath& cache_dir, 6058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch net::URLRequestContextGetter* request_context, 614e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const scoped_refptr<base::SequencedTaskRunner>& 624e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) backend_task_runner, 63ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch Delegate* delegate, 6468043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) bool always_check_updates, 654e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) bool wait_for_cache_initialization); 6658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual ~ExternalCache(); 6758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 684e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Name of flag file that indicates that cache is ready (import finished). 694e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static const char kCacheReadyFlagFileName[]; 704e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 71a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) // Returns already cached extensions. 72a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) const base::DictionaryValue* cached_extensions() { 73a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) return cached_extensions_.get(); 74a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 75a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 7658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Implementation of content::NotificationObserver: 7758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual void Observe(int type, 7858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const content::NotificationSource& source, 7958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const content::NotificationDetails& details) OVERRIDE; 8058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 8158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Implementation of ExtensionDownloaderDelegate: 8258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual void OnExtensionDownloadFailed( 8358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& id, 8458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Error error, 8558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const PingResult& ping_result, 8658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::set<int>& request_ids) OVERRIDE; 8758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 8858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual void OnExtensionDownloadFinished( 8958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& id, 9058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const base::FilePath& path, 9158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const GURL& download_url, 9258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& version, 9358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const PingResult& ping_result, 9458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::set<int>& request_ids) OVERRIDE; 9558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 9658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual bool IsExtensionPending(const std::string& id) OVERRIDE; 9758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 9858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch virtual bool GetExtensionExistingVersion(const std::string& id, 9958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch std::string* version) OVERRIDE; 10058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1014e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Shut down the cache. The |callback| will be invoked when the cache has shut 1024e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // down completely and there are no more pending file I/O operations. 1034e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void Shutdown(const base::Closure& callback); 1044e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1054e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Replace the list of extensions to cache with |prefs| and perform update 1064e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // checks for these. 1074e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void UpdateExtensionsList(scoped_ptr<base::DictionaryValue> prefs); 1084e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1094e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // If a user of one of the ExternalCache's extensions detects that 1104e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // the extension is damaged then this method can be used to remove it from 1114e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // the cache and retry to download it after a restart. 1124e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void OnDamagedFileDetected(const base::FilePath& path); 11358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1144e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) private: 11558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Notifies the that the cache has been updated, providing 11658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // extensions loader with an updated list of extensions. 11758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch void UpdateExtensionLoader(); 11858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1194e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Checks the cache contents and deletes any entries no longer referenced by 1204e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // |extensions_|. If |wait_for_cache_initialization_| is |true|, waits for the 1214e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // cache to become ready first, as indicated by the presence of a flag file. 1224e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void CheckCache(); 1234e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1244e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Checks whether a flag file exists in the |cache_dir|, indicating that the 1254e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // cache is ready. This method is invoked via the |backend_task_runner_| and 1264e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // posts its result back to the |external_cache| on the UI thread. 1274e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static void BackendCheckCacheStatus( 12858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch base::WeakPtr<ExternalCache> external_cache, 1294e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const base::FilePath& cache_dir); 1304e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1314e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Invoked on the UI thread after checking whether the cache is ready. If the 1324e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // cache is not ready yet, posts a delayed task that will repeat the check, 1334e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // thus polling for cache readiness. 1344e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void OnCacheStatusChecked(bool ready); 1354e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1364e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Checks the cache contents. This is a helper that invokes the actual check 1374e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // by posting to the |backend_task_runner_|. 1384e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) void CheckCacheContents(); 1394e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1404e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Checks the cache contents, deleting any entries no longer referenced by 1414e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // |prefs|. This method is invoked via the |backend_task_runner_| and posts 1424e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // back a list of cache entries to the |external_cache| on the UI thread. 1434e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static void BackendCheckCacheContents( 1444e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) base::WeakPtr<ExternalCache> external_cache, 1454e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const base::FilePath& cache_dir, 1464e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) scoped_ptr<base::DictionaryValue> prefs); 1474e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 1484e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Helper for BackendCheckCacheContents() that updates |prefs|. 1494e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static void BackendCheckCacheContentsInternal( 1504e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const base::FilePath& cache_dir, 15158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch base::DictionaryValue* prefs); 15258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 15358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Invoked when the cache has been updated. |prefs| contains all the currently 15458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // valid crx files in the cache, ownerships is transfered to this function. 15558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch void OnCacheUpdated(scoped_ptr<base::DictionaryValue> prefs); 15658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1574e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Installs the downloaded crx file at |path| in the |cache_dir|. This method 1584e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // is invoked via the |backend_task_runner_|. 1594e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static void BackendInstallCacheEntry( 16058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch base::WeakPtr<ExternalCache> external_cache, 1614e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const base::FilePath& cache_dir, 16258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& id, 16358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const base::FilePath& path, 16458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& version); 16558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 16658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Invoked on the UI thread when a new entry has been installed in the cache. 16758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch void OnCacheEntryInstalled(const std::string& id, 1684e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const base::FilePath& path, 16958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch const std::string& version); 17058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1714e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Posted to the |backend_task_runner_| during cache shutdown so that it runs 1724e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // after all file I/O has been completed. Invokes |callback| on the UI thread 1734e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // to indicate that the cache has been shut down completely. 1744e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) static void BackendShudown(const base::Closure& callback); 17558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1764e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Path to the directory where the extension cache is stored. 1774e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) base::FilePath cache_dir_; 17858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 17958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Request context used by the |downloader_|. 18058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch net::URLRequestContextGetter* request_context_; 18158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 18258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Delegate that would like to get notifications about cache updates. 18358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Delegate* delegate_; 18458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 1854e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Whether the cache shutdown has been initiated. 1864e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) bool shutdown_; 1874e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 188ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch // Updates needs to be check for the extensions with external_crx too. 189ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch bool always_check_updates_; 190ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch 19168043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) // Set to true if cache should wait for initialization flag file. 1924e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) bool wait_for_cache_initialization_; 19368043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) 19458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // This is the list of extensions currently configured. 19558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch scoped_ptr<base::DictionaryValue> extensions_; 19658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 19758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // This contains extensions that are both currently configured 19858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // and that have a valid crx in the cache. 19958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch scoped_ptr<base::DictionaryValue> cached_extensions_; 20058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 20158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Used to download the extensions and to check for updates. 20258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch scoped_ptr<extensions::ExtensionDownloader> downloader_; 20358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 2044e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Task runner for executing file I/O tasks. 2054e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) scoped_refptr<base::SequencedTaskRunner> backend_task_runner_; 20658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 20758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Observes failures to install CRX files. 20858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch content::NotificationRegistrar notification_registrar_; 20958e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 2104e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // Weak factory for callbacks from the backend and delayed tasks. 2114e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) base::WeakPtrFactory<ExternalCache> weak_ptr_factory_; 21258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 21358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch DISALLOW_COPY_AND_ASSIGN(ExternalCache); 21458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch}; 21558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 21658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch} // namespace chromeos 21758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 21858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#endif // CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ 219