Standardize usage of virtual/override/final in content/browser/

content/browser/gpu/browser_gpu_memory_buffer_manager.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 CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include "base/callback.h"
 #include "cc/resources/gpu_memory_buffer_manager.h"
 #include "content/common/content_export.h"
 
 namespace content {
 class GpuMemoryBufferImpl;
 
 class CONTENT_EXPORT BrowserGpuMemoryBufferManager
     : public cc::GpuMemoryBufferManager {
  public:
   typedef base::Callback<void(const gfx::GpuMemoryBufferHandle& handle)>
       AllocationCallback;
 
   explicit BrowserGpuMemoryBufferManager(int gpu_client_id);
-  virtual ~BrowserGpuMemoryBufferManager();
+  ~BrowserGpuMemoryBufferManager() override;
 
   static BrowserGpuMemoryBufferManager* current();
 
   // Overridden from cc::GpuMemoryBufferManager:
-  virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
+  scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
       const gfx::Size& size,
       gfx::GpuMemoryBuffer::Format format,
       gfx::GpuMemoryBuffer::Usage usage) override;
-  virtual gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
+  gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
       ClientBuffer buffer) override;
 
   void AllocateGpuMemoryBufferForChildProcess(
       const gfx::Size& size,
       gfx::GpuMemoryBuffer::Format format,
       gfx::GpuMemoryBuffer::Usage usage,
       base::ProcessHandle child_process_handle,
       int child_client_id,
       const AllocationCallback& callback);
   void ChildProcessDeletedGpuMemoryBuffer(
@@ skipping 10 matching lines @@
   static void GpuMemoryBufferCreatedOnIO(
       AllocateGpuMemoryBufferRequest* request,
       scoped_ptr<GpuMemoryBufferImpl> buffer);
 
   int gpu_client_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_