replace OVERRIDE and FINAL with override and final in ash/

ash/gpu_support_stub.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 ASH_GPU_SUPPORT_STUB_H_
 #define ASH_GPU_SUPPORT_STUB_H_
 
 #include "ash/ash_export.h"
 #include "ash/gpu_support.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 
 // A GPUSupport object that does not depend on src/content.
 class ASH_EXPORT GPUSupportStub : public GPUSupport {
  public:
   GPUSupportStub();
   virtual ~GPUSupportStub();
 
  private:
   // Overridden from GPUSupport:
-  virtual bool IsPanelFittingDisabled() const OVERRIDE;
-  virtual void DisableGpuWatchdog() OVERRIDE;
+  virtual bool IsPanelFittingDisabled() const override;
+  virtual void DisableGpuWatchdog() override;
   virtual void GetGpuProcessHandles(
-      const GetGpuProcessHandlesCallback& callback) const OVERRIDE;
+      const GetGpuProcessHandlesCallback& callback) const override;
 
   DISALLOW_COPY_AND_ASSIGN(GPUSupportStub);
 };
 
 }  // namespace ash
 
 #endif  // ASH_GPU_SUPPORT_STUB_H_