Add OVERRIDE to chrome/browser/sync/.

chrome/browser/sync/engine/syncer_end_command.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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_ENGINE_SYNCER_END_COMMAND_H_
 #define CHROME_BROWSER_SYNC_ENGINE_SYNCER_END_COMMAND_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "base/compiler_specific.h"
 #include "chrome/browser/sync/engine/syncer_command.h"
 
 namespace browser_sync {
 
 // A syncer command for wrapping up a sync cycle.
 //
 // Preconditions - syncing is complete.
 //
 // Postconditions - The UI has been told that we're done syncing.
 
 class SyncerEndCommand : public SyncerCommand {
  public:
   SyncerEndCommand();
   virtual ~SyncerEndCommand();
 
   // SyncerCommand implementation.
-  virtual void ExecuteImpl(sessions::SyncSession* session);
+  virtual void ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncerEndCommand);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_SYNCER_END_COMMAND_H_