SuggestionsService: implement SyncServiceObserver

ios/chrome/browser/suggestions/suggestions_service_factory.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ios/chrome/browser/suggestions/suggestions_service_factory.h"
 
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/memory/singleton.h"
 #include "base/sequenced_task_runner.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "components/browser_sync/browser/profile_sync_service.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/leveldb_proto/proto_database_impl.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/suggestions/blacklist_store.h"
 #include "components/suggestions/image_fetcher.h"
 #include "components/suggestions/image_manager.h"
 #include "components/suggestions/suggestions_service.h"
 #include "components/suggestions/suggestions_store.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/signin/oauth2_token_service_factory.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/suggestions/image_fetcher_impl.h"
+#include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #include "ios/web/public/browser_state.h"
 #include "ios/web/public/web_thread.h"
 
 namespace suggestions {
 namespace {
 const base::FilePath::CharType kThumbnailDirectory[] =
     FILE_PATH_LITERAL("Thumbnail");
 }
 
 // static
 SuggestionsServiceFactory* SuggestionsServiceFactory::GetInstance() {
   return base::Singleton<SuggestionsServiceFactory>::get();
 }
 
 // static
 SuggestionsService* SuggestionsServiceFactory::GetForBrowserState(
     ios::ChromeBrowserState* browser_state) {
   return static_cast<SuggestionsService*>(
       GetInstance()->GetServiceForBrowserState(browser_state, true));
 }
 
 SuggestionsServiceFactory::SuggestionsServiceFactory()
     : BrowserStateKeyedServiceFactory(
           "SuggestionsService",
           BrowserStateDependencyManager::GetInstance()) {
   DependsOn(ios::SigninManagerFactory::GetInstance());
   DependsOn(OAuth2TokenServiceFactory::GetInstance());
+  DependsOn(IOSChromeProfileSyncServiceFactory::GetInstance());
 }
 
 SuggestionsServiceFactory::~SuggestionsServiceFactory() {
 }
 
 scoped_ptr<KeyedService> SuggestionsServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   base::SequencedWorkerPool* sequenced_worker_pool =
       web::WebThread::GetBlockingPool();
   scoped_refptr<base::SequencedTaskRunner> background_task_runner =
       sequenced_worker_pool->GetSequencedTaskRunner(
           sequenced_worker_pool->GetSequenceToken());
 
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
   SigninManager* signin_manager =
       ios::SigninManagerFactory::GetForBrowserState(browser_state);
   ProfileOAuth2TokenService* token_service =
       OAuth2TokenServiceFactory::GetForBrowserState(browser_state);
+  ProfileSyncService* sync_service =
+      IOSChromeProfileSyncServiceFactory::GetForBrowserState(browser_state);
   base::FilePath database_dir(
       browser_state->GetStatePath().Append(kThumbnailDirectory));
   scoped_ptr<SuggestionsStore> suggestions_store(
       new SuggestionsStore(browser_state->GetPrefs()));
   scoped_ptr<BlacklistStore> blacklist_store(
       new BlacklistStore(browser_state->GetPrefs()));
   scoped_ptr<leveldb_proto::ProtoDatabaseImpl<ImageData>> db(
       new leveldb_proto::ProtoDatabaseImpl<ImageData>(background_task_runner));
   scoped_ptr<ImageFetcher> image_fetcher(new ImageFetcherImpl(
       browser_state->GetRequestContext(), sequenced_worker_pool));
   scoped_ptr<ImageManager> thumbnail_manager(new ImageManager(
       std::move(image_fetcher), std::move(db), database_dir,
       web::WebThread::GetTaskRunnerForThread(web::WebThread::DB)));
   return make_scoped_ptr(new SuggestionsService(
-      signin_manager, token_service, browser_state->GetRequestContext(),
-      std::move(suggestions_store), std::move(thumbnail_manager),
-      std::move(blacklist_store)));
+      signin_manager, token_service, sync_service,
+      browser_state->GetRequestContext(), std::move(suggestions_store),
+      std::move(thumbnail_manager), std::move(blacklist_store)));
 }
 
 void SuggestionsServiceFactory::RegisterBrowserStatePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   SuggestionsService::RegisterProfilePrefs(registry);
 }
 
 }  // namespace suggestions