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

content/browser/gpu/browser_gpu_channel_host_factory.h

Index: content/browser/gpu/browser_gpu_channel_host_factory.h
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.h b/content/browser/gpu/browser_gpu_channel_host_factory.h
index c013558045735717541bcf8310130c24c7043920..4bc0b413153b8fd35230c09e390528a3045dc9fa 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.h
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.h
@@ -24,12 +24,11 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   static BrowserGpuChannelHostFactory* instance() { return instance_; }
 
   // GpuChannelHostFactory implementation.
-  virtual bool IsMainThread() override;
-  virtual base::MessageLoop* GetMainLoop() override;
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
-  virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(
-      size_t size) override;
-  virtual CreateCommandBufferResult CreateViewCommandBuffer(
+  bool IsMainThread() override;
+  base::MessageLoop* GetMainLoop() override;
+  scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
+  scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
+  CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) override;
@@ -58,7 +57,7 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   class EstablishRequest;
 
   BrowserGpuChannelHostFactory();
-  virtual ~BrowserGpuChannelHostFactory();
+  ~BrowserGpuChannelHostFactory() override;
 
   void GpuChannelEstablished();
   void CreateViewCommandBufferOnIO(