Standardize usage of virtual/override/final in cc/

cc/surfaces/display.h

Index: cc/surfaces/display.h
diff --git a/cc/surfaces/display.h b/cc/surfaces/display.h
index 451a119e61d494e20df30e6357e0c6848c884a1e..94202c5628369e65ebaecaa524504bc0b270fa05 100644
--- a/cc/surfaces/display.h
+++ b/cc/surfaces/display.h
@@ -43,7 +43,7 @@ class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
           SurfaceManager* manager,
           SharedBitmapManager* bitmap_manager,
           GpuMemoryBufferManager* gpu_memory_buffer_manager);
-  virtual ~Display();
+  ~Display() override;
 
   bool Initialize(scoped_ptr<OutputSurface> output_surface);
   void Resize(SurfaceId id, const gfx::Size& new_size);
@@ -53,32 +53,31 @@ class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
   int GetMaxFramesPending();
 
   // OutputSurfaceClient implementation.
-  virtual void DeferredInitialize() override {}
-  virtual void ReleaseGL() override {}
-  virtual void CommitVSyncParameters(base::TimeTicks timebase,
-                                     base::TimeDelta interval) override;
-  virtual void SetNeedsRedrawRect(const gfx::Rect& damage_rect) override {}
-  virtual void BeginFrame(const BeginFrameArgs& args) override {}
-  virtual void DidSwapBuffers() override;
-  virtual void DidSwapBuffersComplete() override;
-  virtual void ReclaimResources(const CompositorFrameAck* ack) override {}
-  virtual void DidLoseOutputSurface() override;
-  virtual void SetExternalDrawConstraints(
+  void DeferredInitialize() override {}
+  void ReleaseGL() override {}
+  void CommitVSyncParameters(base::TimeTicks timebase,
+                             base::TimeDelta interval) override;
+  void SetNeedsRedrawRect(const gfx::Rect& damage_rect) override {}
+  void BeginFrame(const BeginFrameArgs& args) override {}
+  void DidSwapBuffers() override;
+  void DidSwapBuffersComplete() override;
+  void ReclaimResources(const CompositorFrameAck* ack) override {}
+  void DidLoseOutputSurface() override;
+  void SetExternalDrawConstraints(
       const gfx::Transform& transform,
       const gfx::Rect& viewport,
       const gfx::Rect& clip,
       const gfx::Rect& viewport_rect_for_tile_priority,
       const gfx::Transform& transform_for_tile_priority,
       bool resourceless_software_draw) override {}
-  virtual void SetMemoryPolicy(const ManagedMemoryPolicy& policy) override;
-  virtual void SetTreeActivationCallback(
-      const base::Closure& callback) override {}
+  void SetMemoryPolicy(const ManagedMemoryPolicy& policy) override;
+  void SetTreeActivationCallback(const base::Closure& callback) override {}
 
   // RendererClient implementation.
-  virtual void SetFullRootLayerDamage() override {}
+  void SetFullRootLayerDamage() override {}
 
   // SurfaceDamageObserver implementation.
-  virtual void OnSurfaceDamaged(SurfaceId surface) override;
+  void OnSurfaceDamaged(SurfaceId surface) override;
 
  private:
   void InitializeRenderer();