Update {virtual,override,final} to follow C++11 style.

content/common/gpu/gpu_memory_buffer_factory_surface_texture.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_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "content/common/gpu/gpu_memory_buffer_factory.h"
 #include "gpu/command_buffer/service/image_factory.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gfx {
 class GLImage;
 class SurfaceTexture;
 }
 
 namespace content {
 
 class GpuMemoryBufferFactorySurfaceTexture : public GpuMemoryBufferFactory,
                                              public gpu::ImageFactory {
  public:
   GpuMemoryBufferFactorySurfaceTexture();
-  ~GpuMemoryBufferFactorySurfaceTexture();
+  ~GpuMemoryBufferFactorySurfaceTexture() override;
 
   static bool IsGpuMemoryBufferConfigurationSupported(
       gfx::GpuMemoryBuffer::Format format,
       gfx::GpuMemoryBuffer::Usage usage);
 
   // Overridden from GpuMemoryBufferFactory:
   void GetSupportedGpuMemoryBufferConfigurations(
       std::vector<Configuration>* configurations) override;
   gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
       gfx::GpuMemoryBufferId id,
@@ skipping 18 matching lines @@
   typedef std::pair<int, int> SurfaceTextureMapKey;
   typedef base::hash_map<SurfaceTextureMapKey,
                          scoped_refptr<gfx::SurfaceTexture>> SurfaceTextureMap;
   SurfaceTextureMap surface_textures_;
   base::Lock surface_textures_lock_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_