Add OVERRIDE to base/.

base/task_queue.h

 // 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 BASE_TASK_QUEUE_H_
 #define BASE_TASK_QUEUE_H_
 #pragma once
 
 #include <deque>
 
@@ skipping 16 matching lines @@
   void Push(Task* task);
 
   // Remove all tasks from the queue.  The tasks are deleted.
   void Clear();
 
   // Returns true if this queue contains no tasks.
   bool IsEmpty() const;
 
   // Run all the tasks in the queue.  New tasks pushed onto the queue during
   // a run will be run next time |Run| is called.
-  virtual void Run();
+  virtual void Run() OVERRIDE;
 
  private:
    // The list of tasks we are waiting to run.
    std::deque<Task*> queue_;
 };
 
 #endif  // BASE_TASK_QUEUE_H_