Standardize usage of virtual/override/final in cc/

cc/test/fake_content_layer.h

Index: cc/test/fake_content_layer.h
diff --git a/cc/test/fake_content_layer.h b/cc/test/fake_content_layer.h
index 1debe85f07c31a1f35277020fdc3a875c4a4457c..fd0968319df2093af5de08fda7a9ac96cfb26c00 100644
--- a/cc/test/fake_content_layer.h
+++ b/cc/test/fake_content_layer.h
@@ -16,8 +16,7 @@ class FakeContentLayer : public ContentLayer {
     return make_scoped_refptr(new FakeContentLayer(client));
   }
 
-  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
-      override;
+  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
 
   size_t update_count() const { return update_count_; }
   void reset_update_count() { update_count_ = 0; }
@@ -25,8 +24,8 @@ class FakeContentLayer : public ContentLayer {
   size_t push_properties_count() const { return push_properties_count_; }
   void reset_push_properties_count() { push_properties_count_ = 0; }
 
-  virtual bool Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker<Layer>* occlusion) override;
+  bool Update(ResourceUpdateQueue* queue,
+              const OcclusionTracker<Layer>* occlusion) override;
 
   gfx::Rect LastPaintRect() const;
 
@@ -34,9 +33,9 @@ class FakeContentLayer : public ContentLayer {
     always_update_resources_ = always_update_resources;
   }
 
-  virtual void PushPropertiesTo(LayerImpl* layer) override;
+  void PushPropertiesTo(LayerImpl* layer) override;
 
-  virtual void OnOutputSurfaceCreated() override;
+  void OnOutputSurfaceCreated() override;
   size_t output_surface_created_count() const {
     return output_surface_created_count_;
   }
@@ -45,7 +44,7 @@ class FakeContentLayer : public ContentLayer {
 
  private:
   explicit FakeContentLayer(ContentLayerClient* client);
-  virtual ~FakeContentLayer();
+  ~FakeContentLayer() override;
 
   size_t update_count_;
   size_t push_properties_count_;