Standardize usage of virtual/override/final in content/

content/plugin/webplugin_accelerated_surface_proxy_mac.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 CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
 
 #include "base/compiler_specific.h"
 #include "content/child/npapi/webplugin_accelerated_surface_mac.h"
 #include "ui/gl/gpu_preference.h"
 
 class AcceleratedSurface;
 
 namespace content {
 class WebPluginProxy;
 
 // Out-of-process implementation of WebPluginAcceleratedSurface that proxies
 // calls through a WebPluginProxy.
 class WebPluginAcceleratedSurfaceProxy : public WebPluginAcceleratedSurface {
  public:
   // Creates a new WebPluginAcceleratedSurfaceProxy that uses plugin_proxy
   // to proxy calls. plugin_proxy must outlive this object. Returns NULL if
   // initialization fails.
   static WebPluginAcceleratedSurfaceProxy* Create(
       WebPluginProxy* plugin_proxy,
       gfx::GpuPreference gpu_preference);
 
-  virtual ~WebPluginAcceleratedSurfaceProxy();
+  ~WebPluginAcceleratedSurfaceProxy() override;
 
   // WebPluginAcceleratedSurface implementation.
-  virtual void SetSize(const gfx::Size& size) override;
-  virtual CGLContextObj context() override;
-  virtual void StartDrawing() override;
-  virtual void EndDrawing() override;
+  void SetSize(const gfx::Size& size) override;
+  CGLContextObj context() override;
+  void StartDrawing() override;
+  void EndDrawing() override;
 
  private:
   WebPluginAcceleratedSurfaceProxy(WebPluginProxy* plugin_proxy,
                                    AcceleratedSurface* surface);
 
   WebPluginProxy* plugin_proxy_;  // Weak ref.
   AcceleratedSurface* surface_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginAcceleratedSurfaceProxy);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_