Standardize usage of virtual/override/final in gpu/

gpu/command_buffer/service/gl_state_restorer_impl.h

Index: gpu/command_buffer/service/gl_state_restorer_impl.h
diff --git a/gpu/command_buffer/service/gl_state_restorer_impl.h b/gpu/command_buffer/service/gl_state_restorer_impl.h
index b8ccc44fa84e47f0cef492e76f514e35cae30f57..91d3408ce016183b0ad6f3fb98caf62bfee8b3b7 100644
--- a/gpu/command_buffer/service/gl_state_restorer_impl.h
+++ b/gpu/command_buffer/service/gl_state_restorer_impl.h
@@ -22,13 +22,13 @@ struct ContextState;
 class GPU_EXPORT GLStateRestorerImpl : public gfx::GLStateRestorer {
  public:
    explicit GLStateRestorerImpl(base::WeakPtr<gles2::GLES2Decoder> decoder);
-   virtual ~GLStateRestorerImpl();
+   ~GLStateRestorerImpl() override;
 
-   virtual bool IsInitialized() override;
-   virtual void RestoreState(const gfx::GLStateRestorer* prev_state) override;
-   virtual void RestoreAllTextureUnitBindings() override;
-   virtual void RestoreActiveTextureUnitBinding(unsigned int target) override;
-   virtual void RestoreFramebufferBindings() override;
+   bool IsInitialized() override;
+   void RestoreState(const gfx::GLStateRestorer* prev_state) override;
+   void RestoreAllTextureUnitBindings() override;
+   void RestoreActiveTextureUnitBinding(unsigned int target) override;
+   void RestoreFramebufferBindings() override;
 
  private:
    const gles2::ContextState* GetContextState() const;