[Sync] Fix namespaces for the browser_sync component.

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/ptr_util.h"
@@ skipping 56 matching lines @@
   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 =
+  browser_sync::ProfileSyncService* sync_service =
       IOSChromeProfileSyncServiceFactory::GetForBrowserState(browser_state);
   base::FilePath database_dir(
       browser_state->GetStatePath().Append(kThumbnailDirectory));
   std::unique_ptr<SuggestionsStore> suggestions_store(
       new SuggestionsStore(browser_state->GetPrefs()));
   std::unique_ptr<BlacklistStore> blacklist_store(
       new BlacklistStore(browser_state->GetPrefs()));
   std::unique_ptr<leveldb_proto::ProtoDatabaseImpl<ImageData>> db(
       new leveldb_proto::ProtoDatabaseImpl<ImageData>(background_task_runner));
   std::unique_ptr<image_fetcher::ImageFetcher> image_fetcher(
       new ImageFetcherImpl(browser_state->GetRequestContext(),
                            sequenced_worker_pool));
   std::unique_ptr<ImageManager> thumbnail_manager(new ImageManager(
       std::move(image_fetcher), std::move(db), database_dir,
       web::WebThread::GetTaskRunnerForThread(web::WebThread::DB)));
   return base::MakeUnique<SuggestionsService>(
       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