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

chrome/browser/sync/sync_error_notifier_ash.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_SYNC_ERROR_NOTIFIER_ASH_H_
 #define CHROME_BROWSER_SYNC_SYNC_ERROR_NOTIFIER_ASH_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/sync/driver/sync_error_controller.h"
 
 class Profile;
 
 // Shows sync-related errors as notifications in Ash.
-class SyncErrorNotifier : public SyncErrorController::Observer,
+class SyncErrorNotifier : public syncer::SyncErrorController::Observer,
                           public KeyedService {
  public:
-  SyncErrorNotifier(SyncErrorController* controller, Profile* profile);
+  SyncErrorNotifier(syncer::SyncErrorController* controller, Profile* profile);
   ~SyncErrorNotifier() override;
 
   // KeyedService:
   void Shutdown() override;
 
-  // SyncErrorController::Observer:
+  // syncer::SyncErrorController::Observer:
   void OnErrorChanged() override;
 
  private:
   // The error controller to query for error details.
-  SyncErrorController* error_controller_;
+  syncer::SyncErrorController* error_controller_;
 
   // The Profile this service belongs to.
   Profile* profile_;
 
   // Used to keep track of the message center notification.
   std::string notification_id_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncErrorNotifier);
 };
 
 #endif  // CHROME_BROWSER_SYNC_SYNC_ERROR_NOTIFIER_ASH_H_