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

ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_SYNC_IOS_CHROME_PROFILE_SYNC_TEST_UTIL_H_
 #define IOS_CHROME_BROWSER_SYNC_IOS_CHROME_PROFILE_SYNC_TEST_UTIL_H_
 
 #include <memory>
 
 #include "components/browser_sync/profile_sync_service.h"
 
 namespace ios {
 class ChromeBrowserState;
 }
 
-namespace sync_driver {
+namespace syncer {
 class SyncClient;
 }
 
 namespace web {
 class BrowserState;
 }
 
 // Helper method for constructing ProfileSyncService mocks. If |sync_client|
 // is null, a fresh one is created.
 browser_sync::ProfileSyncService::InitParams
 CreateProfileSyncServiceParamsForTest(
-    std::unique_ptr<sync_driver::SyncClient> sync_client,
+    std::unique_ptr<syncer::SyncClient> sync_client,
     ios::ChromeBrowserState* browser_state);
 
 // Helper routine to be used in conjunction with
 // BrowserStateKeyedServiceFactory::SetTestingFactory().
 std::unique_ptr<KeyedService> BuildMockProfileSyncService(
     web::BrowserState* context);
 
 #endif  // IOS_CHROME_BROWSER_SYNC_IOS_CHROME_PROFILE_SYNC_TEST_UTIL_H_