Standardize usage of virtual/override/final in ui/

ui/compositor/layer.cc

 // 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.
 
 #include "ui/compositor/layer.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 724 matching lines @@
   if (force_render_surface_ == force)
     return;
 
   force_render_surface_ = force;
   cc_layer_->SetForceRenderSurface(force_render_surface_);
 }
 
 class LayerDebugInfo : public base::debug::ConvertableToTraceFormat {
  public:
   explicit LayerDebugInfo(std::string name) : name_(name) { }
-  virtual void AppendAsTraceFormat(std::string* out) const override {
+  void AppendAsTraceFormat(std::string* out) const override {
     base::DictionaryValue dictionary;
     dictionary.SetString("layer_name", name_);
     base::JSONWriter::Write(&dictionary, out);
   }
 
  private:
-  virtual ~LayerDebugInfo() { }
+  ~LayerDebugInfo() override {}
   std::string name_;
 };
 
 scoped_refptr<base::debug::ConvertableToTraceFormat> Layer::TakeDebugInfo() {
   return new LayerDebugInfo(name_);
 }
 
 void Layer::OnAnimationStarted(const cc::AnimationEvent& event) {
   if (animator_.get())
     animator_->OnThreadedAnimationStarted(event);
@@ skipping 278 matching lines @@
       children_.end(),
       std::bind2nd(std::mem_fun(&Layer::RemoveAnimatorsInTreeFromCollection),
                    collection));
 }
 
 bool Layer::IsAnimating() const {
   return animator_.get() && animator_->is_animating();
 }
 
 }  // namespace ui