Standardize usage of virtual/override/final in cc/

cc/quads/yuv_video_draw_quad.h

 // Copyright 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.
 
 #ifndef CC_QUADS_YUV_VIDEO_DRAW_QUAD_H_
 #define CC_QUADS_YUV_VIDEO_DRAW_QUAD_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/video_layer_impl.h"
 #include "cc/quads/draw_quad.h"
 
 namespace cc {
 
 class CC_EXPORT YUVVideoDrawQuad : public DrawQuad {
  public:
   enum ColorSpace {
     REC_601,       // SDTV standard with restricted "studio swing" color range.
     REC_601_JPEG,  // Full color range [0, 255] variant of the above.
     COLOR_SPACE_LAST = REC_601_JPEG
   };
 
-  virtual ~YUVVideoDrawQuad();
+  ~YUVVideoDrawQuad() override;
 
   YUVVideoDrawQuad();
 
   void SetNew(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               const gfx::Rect& visible_rect,
               const gfx::RectF& tex_coord_rect,
               unsigned y_plane_resource_id,
               unsigned u_plane_resource_id,
@@ skipping 13 matching lines @@
               unsigned a_plane_resource_id,
               ColorSpace color_space);
 
   gfx::RectF tex_coord_rect;
   unsigned y_plane_resource_id;
   unsigned u_plane_resource_id;
   unsigned v_plane_resource_id;
   unsigned a_plane_resource_id;
   ColorSpace color_space;
 
-  virtual void IterateResources(const ResourceIteratorCallback& callback)
-      override;
+  void IterateResources(const ResourceIteratorCallback& callback) override;
 
   static const YUVVideoDrawQuad* MaterialCast(const DrawQuad*);
 
  private:
-  virtual void ExtendValue(base::debug::TracedValue* value) const override;
+  void ExtendValue(base::debug::TracedValue* value) const override;
 };
 
 }  // namespace cc
 
 #endif  // CC_QUADS_YUV_VIDEO_DRAW_QUAD_H_