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      1 // Copyright 2014 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/predictors/resource_prefetch_predictor_factory.h"
      6 
      7 #include "chrome/browser/history/history_service_factory.h"
      8 #include "chrome/browser/predictors/predictor_database_factory.h"
      9 #include "chrome/browser/predictors/resource_prefetch_common.h"
     10 #include "chrome/browser/predictors/resource_prefetch_predictor.h"
     11 #include "chrome/browser/profiles/profile.h"
     12 #include "components/keyed_service/content/browser_context_dependency_manager.h"
     13 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
     14 
     15 namespace predictors {
     16 
     17 // static
     18 ResourcePrefetchPredictor* ResourcePrefetchPredictorFactory::GetForProfile(
     19     content::BrowserContext* context) {
     20   return static_cast<ResourcePrefetchPredictor*>(
     21       GetInstance()->GetServiceForBrowserContext(context, true));
     22 }
     23 
     24 // static
     25 ResourcePrefetchPredictorFactory*
     26 ResourcePrefetchPredictorFactory::GetInstance() {
     27   return Singleton<ResourcePrefetchPredictorFactory>::get();
     28 }
     29 
     30 ResourcePrefetchPredictorFactory::ResourcePrefetchPredictorFactory()
     31     : BrowserContextKeyedServiceFactory(
     32         "ResourcePrefetchPredictor",
     33         BrowserContextDependencyManager::GetInstance()) {
     34   DependsOn(HistoryServiceFactory::GetInstance());
     35   DependsOn(PredictorDatabaseFactory::GetInstance());
     36 }
     37 
     38 ResourcePrefetchPredictorFactory::~ResourcePrefetchPredictorFactory() {}
     39 
     40 KeyedService*
     41     ResourcePrefetchPredictorFactory::BuildServiceInstanceFor(
     42         content::BrowserContext* context) const {
     43   Profile* profile = Profile::FromBrowserContext(context);
     44 
     45   ResourcePrefetchPredictorConfig config;
     46   if (!IsSpeculativeResourcePrefetchingEnabled(profile, &config))
     47     return NULL;
     48 
     49   return new ResourcePrefetchPredictor(config, profile);
     50 }
     51 
     52 }  // namespace predictors
     53