Standardize usage of virtual/override/final specifiers.

gpu/tools/compositor_model_bench/render_tree.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Data structures for representing parts of Chromium's composited layer tree
 // and a function to load it from the JSON configuration file
 
 #ifndef GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_
 #define GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_
 
@@ skipping 118 matching lines @@
   int targetSurface_;
   float transform_[16];
   std::vector<Tile> tiles_;
   int tile_width_;
   int tile_height_;
 };
 
 class ContentLayerNode : public RenderNode {
  public:
   ContentLayerNode();
-  virtual ~ContentLayerNode();
-  virtual void Accept(RenderNodeVisitor* v) override;
+  ~ContentLayerNode() override;
+  void Accept(RenderNodeVisitor* v) override;
 
   void set_skipsDraw(bool skips) {
     skipsDraw_ = skips;
   }
 
   void add_child(RenderNode* child) {
     children_.push_back(child);
   }
 
  private:
   ScopedVector<RenderNode> children_;
   bool skipsDraw_;
 };
 
 class CCNode : public RenderNode {
  public:
   CCNode();
-  virtual ~CCNode();
+  ~CCNode() override;
 
-  virtual void Accept(RenderNodeVisitor* v) override;
+  void Accept(RenderNodeVisitor* v) override;
 
   ShaderID vertex_shader() {
     return vertex_shader_;
   }
 
   void set_vertex_shader(ShaderID shader) {
     vertex_shader_ = shader;
   }
 
   ShaderID fragment_shader() {
@@ skipping 31 matching lines @@
   virtual void BeginVisitCCNode(CCNode* v);
   virtual void EndVisitRenderNode(RenderNode* v);
   virtual void EndVisitContentLayerNode(ContentLayerNode* v);
   virtual void EndVisitCCNode(CCNode* v);
 };
 
 RenderNode* BuildRenderTreeFromFile(const base::FilePath& path);
 
 #endif  // GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_