replace 'virtual ... OVERRIDE' with '... override'

base/message_loop/message_loop_proxy_impl.h

 // Copyright (c) 2012 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_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_
 
 #include "base/base_export.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/pending_task.h"
 #include "base/threading/platform_thread.h"
 
 namespace base {
 namespace internal {
 
 class IncomingTaskQueue;
 
 // A stock implementation of MessageLoopProxy that is created and managed by a
 // MessageLoop. For now a MessageLoopProxyImpl can only be created as part of a
 // MessageLoop.
 class BASE_EXPORT MessageLoopProxyImpl : public MessageLoopProxy {
  public:
   explicit MessageLoopProxyImpl(
       scoped_refptr<IncomingTaskQueue> incoming_queue);
 
   // MessageLoopProxy implementation
-  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
-                               const base::Closure& task,
-                               base::TimeDelta delay) OVERRIDE;
+  bool PostDelayedTask(const tracked_objects::Location& from_here,
+                       const base::Closure& task,
+                       base::TimeDelta delay) override;
   virtual bool PostNonNestableDelayedTask(
       const tracked_objects::Location& from_here,
       const base::Closure& task,
-      base::TimeDelta delay) OVERRIDE;
-  virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
+      base::TimeDelta delay) override;
+  bool RunsTasksOnCurrentThread() const override;
 
  private:
   friend class RefCountedThreadSafe<MessageLoopProxyImpl>;
   virtual ~MessageLoopProxyImpl();
 
   // THe incoming queue receiving all posted tasks.
   scoped_refptr<IncomingTaskQueue> incoming_queue_;
 
   // ID of the thread |this| was created on.
   PlatformThreadId valid_thread_id_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageLoopProxyImpl);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_