Standardize usage of virtual/override/final in cc/

cc/layers/layer.h

 // Copyright 2010 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_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 447 matching lines @@
   }
 
   virtual void RunMicroBenchmark(MicroBenchmark* benchmark);
 
   void Set3dSortingContextId(int id);
   int sorting_context_id() const { return sorting_context_id_; }
 
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
-  virtual ~Layer();
+  ~Layer() override;
 
   Layer();
 
   // These SetNeeds functions are in order of severity of update:
   //
   // Called when this layer has been modified in some way, but isn't sure
   // that it needs a commit yet.  It needs CalcDrawProperties and UpdateLayers
   // before it knows whether or not a commit is required.
   void SetNeedsUpdate();
   // Called when a property has been modified in a way that the layer
@@ skipping 66 matching lines @@
   void SetParent(Layer* layer);
   bool DescendantIsFixedToContainerLayer() const;
 
   // Returns the index of the child or -1 if not found.
   int IndexOfChild(const Layer* reference);
 
   // This should only be called from RemoveFromParent().
   void RemoveChildOrDependent(Layer* child);
 
   // LayerAnimationValueProvider implementation.
-  virtual gfx::ScrollOffset ScrollOffsetForAnimation() const override;
+  gfx::ScrollOffset ScrollOffsetForAnimation() const override;
 
   // LayerAnimationValueObserver implementation.
-  virtual void OnFilterAnimated(const FilterOperations& filters) override;
-  virtual void OnOpacityAnimated(float opacity) override;
-  virtual void OnTransformAnimated(const gfx::Transform& transform) override;
-  virtual void OnScrollOffsetAnimated(
-      const gfx::ScrollOffset& scroll_offset) override;
-  virtual void OnAnimationWaitingForDeletion() override;
-  virtual bool IsActive() const override;
+  void OnFilterAnimated(const FilterOperations& filters) override;
+  void OnOpacityAnimated(float opacity) override;
+  void OnTransformAnimated(const gfx::Transform& transform) override;
+  void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset) override;
+  void OnAnimationWaitingForDeletion() override;
+  bool IsActive() const override;
 
   // If this layer has a scroll parent, it removes |this| from its list of
   // scroll children.
   void RemoveFromScrollTree();
 
   // If this layer has a clip parent, it removes |this| from its list of clip
   // children.
   void RemoveFromClipTree();
 
   LayerList children_;
@@ skipping 66 matching lines @@
   DrawProperties<Layer> draw_properties_;
 
   PaintProperties paint_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_