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 #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 namespace prerender {
  28
  29 // static
  30 PrerenderManager* PrerenderManagerFactory::GetForProfile(
  31     Profile* profile) {
  32   TRACE_EVENT0("browser", "PrerenderManagerFactory::GetForProfile")
  33   if (!PrerenderManager::IsPrerenderingPossible())
  34     return NULL;
  35   return static_cast<PrerenderManager*>(
  36       GetInstance()->GetServiceForBrowserContext(profile, true));
  37 }
  38
  39 // static
  40 PrerenderManagerFactory* PrerenderManagerFactory::GetInstance() {
  41   return Singleton<PrerenderManagerFactory>::get();
  42 }
  43
  44 PrerenderManagerFactory::PrerenderManagerFactory()
  45     : BrowserContextKeyedServiceFactory(
  46         "PrerenderManager",
  47         BrowserContextDependencyManager::GetInstance()) {
  48   DependsOn(extensions::ExtensionSystemFactory::GetInstance());
  49   // PrerenderLocalPredictor observers the history visit DB.
  50   DependsOn(HistoryServiceFactory::GetInstance());
  51   DependsOn(predictors::PredictorDatabaseFactory::GetInstance());
  52   DependsOn(ProfileSyncServiceFactory::GetInstance());
  53 }
  54
  55 PrerenderManagerFactory::~PrerenderManagerFactory() {
  56 }
  57
  58 BrowserContextKeyedService* PrerenderManagerFactory::BuildServiceInstanceFor(
  59     content::BrowserContext* profile) const {
  60   CHECK(g_browser_process->prerender_tracker());
  61 #if defined(OS_ANDROID)
  62   if (base::android::SysUtils::IsLowEndDevice())
  63     return NULL;
  64 #endif
  65
  66   PrerenderManager* prerender_manager = new PrerenderManager(
  67       static_cast<Profile*>(profile), g_browser_process->prerender_tracker());
  68 #if defined(OS_CHROMEOS)
  69   if (chromeos::NetworkHandler::IsInitialized())
  70     prerender_manager->AddCondition(new chromeos::PrerenderConditionNetwork);
  71 #endif
  72   return prerender_manager;
  73 }
  74
  75 content::BrowserContext* PrerenderManagerFactory::GetBrowserContextToUse(
  76     content::BrowserContext* context) const {
  77   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
  78 }
  79
  80 }  // namespace prerender