Standardize usage of virtual/override/final specifiers.

gpu/tools/compositor_model_bench/forward_render_model.h

Index: gpu/tools/compositor_model_bench/forward_render_model.h
diff --git a/gpu/tools/compositor_model_bench/forward_render_model.h b/gpu/tools/compositor_model_bench/forward_render_model.h
index 68f02a8bf64523281fb9614d5084070f03b8394f..5495c184dca9209095178dd5eed4c798da6ffe47 100644
--- a/gpu/tools/compositor_model_bench/forward_render_model.h
+++ b/gpu/tools/compositor_model_bench/forward_render_model.h
@@ -19,9 +19,9 @@ class ForwardRenderSimulator : public RenderModelSimulator {
   explicit ForwardRenderSimulator(RenderNode* root,
                                   int window_width,
                                   int window_height);
-  virtual ~ForwardRenderSimulator() override;
-  virtual void Update() override;
-  virtual void Resize(int width, int height) override;
+  ~ForwardRenderSimulator() override;
+  void Update() override;
+  void Resize(int width, int height) override;
 
  private:
   scoped_ptr<ForwardRenderNodeVisitor> visitor_;