src/chrome/browser/prerender/prerender_manager_factory.cc

   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/prerender/prerender_manager_factory.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "base/sys_info.h"
   9 #include "chrome/browser/browser_process.h"
  10 #include "chrome/browser/history/history_service_factory.h"
  11 #include "chrome/browser/predictors/predictor_database_factory.h"
  12 #include "chrome/browser/prerender/prerender_manager.h"
  13 #include "chrome/browser/profiles/incognito_helpers.h"
  14 #include "chrome/browser/profiles/profile.h"
  15 #include "chrome/browser/sync/profile_sync_service_factory.h"
  16 #include "components/keyed_service/content/browser_context_dependency_manager.h"
  17
  18 #if defined(OS_ANDROID)
  19 #include "chrome/browser/android/prerender_condition_platform.h"
  20 #endif
  21
  22 #if defined(OS_CHROMEOS)
  23 #include "chrome/browser/chromeos/prerender_condition_network.h"
  24 #include "chromeos/network/network_handler.h"
  25 #endif
  26
  27 #if defined(ENABLE_EXTENSIONS)
  28 #include "extensions/browser/extension_system_provider.h"
  29 #include "extensions/browser/extensions_browser_client.h"
  30 #endif
  31
  32 namespace prerender {
  33
  34 // static
  35 PrerenderManager* PrerenderManagerFactory::GetForProfile(
  36     Profile* profile) {
  37   TRACE_EVENT0("browser", "PrerenderManagerFactory::GetForProfile")
  38   if (!PrerenderManager::IsPrerenderingPossible())
  39     return NULL;
  40   return static_cast<PrerenderManager*>(
  41       GetInstance()->GetServiceForBrowserContext(profile, true));
  42 }
  43
  44 // static
  45 PrerenderManagerFactory* PrerenderManagerFactory::GetInstance() {
  46   return Singleton<PrerenderManagerFactory>::get();
  47 }
  48
  49 PrerenderManagerFactory::PrerenderManagerFactory()
  50     : BrowserContextKeyedServiceFactory(
  51         "PrerenderManager",
  52         BrowserContextDependencyManager::GetInstance()) {
  53 #if defined(ENABLE_EXTENSIONS)
  54   DependsOn(
  55       extensions::ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
  56 #endif
  57   // PrerenderLocalPredictor observers the history visit DB.
  58   DependsOn(HistoryServiceFactory::GetInstance());
  59   DependsOn(predictors::PredictorDatabaseFactory::GetInstance());
  60   DependsOn(ProfileSyncServiceFactory::GetInstance());
  61 }
  62
  63 PrerenderManagerFactory::~PrerenderManagerFactory() {
  64 }
  65
  66 KeyedService* PrerenderManagerFactory::BuildServiceInstanceFor(
  67     content::BrowserContext* browser_context) const {
  68   Profile* profile = Profile::FromBrowserContext(browser_context);
  69   CHECK(g_browser_process->prerender_tracker());
  70   if (base::SysInfo::IsLowEndDevice())
  71     return NULL;
  72
  73   PrerenderManager* prerender_manager = new PrerenderManager(
  74       profile, g_browser_process->prerender_tracker());
  75 #if defined(OS_CHROMEOS)
  76   if (chromeos::NetworkHandler::IsInitialized())
  77     prerender_manager->AddCondition(new chromeos::PrerenderConditionNetwork);
  78 #endif
  79 #if defined(OS_ANDROID)
  80   prerender_manager->AddCondition(new android::PrerenderConditionPlatform(
  81       browser_context));
  82 #endif
  83   return prerender_manager;
  84 }
  85
  86 content::BrowserContext* PrerenderManagerFactory::GetBrowserContextToUse(
  87     content::BrowserContext* context) const {
  88   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
  89 }
  90
  91 }  // namespace prerender