[Sync] Move //components/sync to the syncer namespace.

ios/chrome/browser/history/web_history_service_factory.cc

 // Copyright 2015 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/history/web_history_service_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/history/core/browser/web_history_service.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/sync/driver/sync_service.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/sync/ios_chrome_profile_sync_service_factory.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace ios {
 namespace {
 
 // Returns true if the user is signed-in and full history sync is enabled,
 // false otherwise.
 bool IsHistorySyncEnabled(ios::ChromeBrowserState* browser_state) {
-  sync_driver::SyncService* sync_service =
+  syncer::SyncService* sync_service =
       IOSChromeProfileSyncServiceFactory::GetForBrowserState(browser_state);
   return sync_service && sync_service->IsSyncActive() &&
          sync_service->GetActiveDataTypes().Has(
              syncer::HISTORY_DELETE_DIRECTIVES);
 }
 
 }  // namespace
 
 // static
 history::WebHistoryService* WebHistoryServiceFactory::GetForBrowserState(
@@ skipping 28 matching lines @@
     web::BrowserState* context) const {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
   return base::MakeUnique<history::WebHistoryService>(
       OAuth2TokenServiceFactory::GetForBrowserState(browser_state),
       ios::SigninManagerFactory::GetForBrowserState(browser_state),
       browser_state->GetRequestContext());
 }
 
 }  // namespace ios