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