Standardize usage of virtual/override/final in cc/

cc/test/fake_output_surface.h

Index: cc/test/fake_output_surface.h
diff --git a/cc/test/fake_output_surface.h b/cc/test/fake_output_surface.h
index 37c0c54a39c5a31351f1bb4f490463e7e2170c81..59c9a8c30e29e0c92b7f65158ddf0d81adccc28d 100644
--- a/cc/test/fake_output_surface.h
+++ b/cc/test/fake_output_surface.h
@@ -20,7 +20,7 @@ namespace cc {
 
 class FakeOutputSurface : public OutputSurface {
  public:
-  virtual ~FakeOutputSurface();
+  ~FakeOutputSurface() override;
 
   static scoped_ptr<FakeOutputSurface> Create3d() {
     return make_scoped_ptr(new FakeOutputSurface(
@@ -92,12 +92,12 @@ class FakeOutputSurface : public OutputSurface {
   CompositorFrame& last_sent_frame() { return last_sent_frame_; }
   size_t num_sent_frames() { return num_sent_frames_; }
 
-  virtual void SwapBuffers(CompositorFrame* frame) override;
+  void SwapBuffers(CompositorFrame* frame) override;
 
-  virtual void SetNeedsBeginFrame(bool enable) override;
+  void SetNeedsBeginFrame(bool enable) override;
   bool needs_begin_frame() const { return needs_begin_frame_; }
 
-  virtual bool BindToClient(OutputSurfaceClient* client) override;
+  bool BindToClient(OutputSurfaceClient* client) override;
 
   using OutputSurface::ReleaseGL;
   using OutputSurface::InitializeAndSetContext3d;
@@ -110,7 +110,7 @@ class FakeOutputSurface : public OutputSurface {
 
   void ReturnResource(unsigned id, CompositorFrameAck* ack);
 
-  virtual bool HasExternalStencilTest() const override;
+  bool HasExternalStencilTest() const override;
 
   void set_has_external_stencil_test(bool has_test) {
     has_external_stencil_test_ = has_test;