Standardize usage of virtual/override/final in cc/

cc/layers/painted_scrollbar_layer_impl.h

 // Copyright 2013 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.
 
 #ifndef CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
 #define CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/input/scrollbar.h"
 #include "cc/layers/scrollbar_layer_impl_base.h"
 #include "cc/resources/ui_resource_client.h"
 
 namespace cc {
 
 class LayerTreeImpl;
 class ScrollView;
 
 class CC_EXPORT PaintedScrollbarLayerImpl : public ScrollbarLayerImplBase {
  public:
   static scoped_ptr<PaintedScrollbarLayerImpl> Create(
       LayerTreeImpl* tree_impl,
       int id,
       ScrollbarOrientation orientation);
-  virtual ~PaintedScrollbarLayerImpl();
+  ~PaintedScrollbarLayerImpl() override;
 
   // LayerImpl implementation.
-  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
-      override;
-  virtual void PushPropertiesTo(LayerImpl* layer) override;
+  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
+  void PushPropertiesTo(LayerImpl* layer) override;
 
-  virtual bool WillDraw(DrawMode draw_mode,
-                        ResourceProvider* resource_provider) override;
-  virtual void AppendQuads(RenderPass* render_pass,
-                           const Occlusion& occlusion_in_content_space,
-                           AppendQuadsData* append_quads_data) override;
+  bool WillDraw(DrawMode draw_mode,
+                ResourceProvider* resource_provider) override;
+  void AppendQuads(RenderPass* render_pass,
+                   const Occlusion& occlusion_in_content_space,
+                   AppendQuadsData* append_quads_data) override;
 
   void SetThumbThickness(int thumb_thickness);
   void SetThumbLength(int thumb_length);
   void SetTrackStart(int track_start);
   void SetTrackLength(int track_length);
 
   void set_track_ui_resource_id(UIResourceId uid) {
     track_ui_resource_id_ = uid;
   }
   void set_thumb_ui_resource_id(UIResourceId uid) {
     thumb_ui_resource_id_ = uid;
   }
 
  protected:
   PaintedScrollbarLayerImpl(LayerTreeImpl* tree_impl,
                             int id,
                             ScrollbarOrientation orientation);
 
   // ScrollbarLayerImplBase implementation.
-  virtual int ThumbThickness() const override;
-  virtual int ThumbLength() const override;
-  virtual float TrackLength() const override;
-  virtual int TrackStart() const override;
-  virtual bool IsThumbResizable() const override;
+  int ThumbThickness() const override;
+  int ThumbLength() const override;
+  float TrackLength() const override;
+  int TrackStart() const override;
+  bool IsThumbResizable() const override;
 
  private:
-  virtual const char* LayerTypeAsString() const override;
+  const char* LayerTypeAsString() const override;
 
   UIResourceId track_ui_resource_id_;
   UIResourceId thumb_ui_resource_id_;
 
   int thumb_thickness_;
   int thumb_length_;
   int track_start_;
   int track_length_;
 
   // Difference between the clip layer's height and the visible viewport
   // height (which may differ in the presence of top-controls hiding).
   float vertical_adjust_;
 
   int scroll_layer_id_;
 
   DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayerImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_