Standardize usage of virtual/override/final in cc/

cc/quads/render_pass_draw_quad.h

 // Copyright 2011 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_RENDER_PASS_DRAW_QUAD_H_
 #define CC_QUADS_RENDER_PASS_DRAW_QUAD_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/filter_operations.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/render_pass_id.h"
 #include "cc/resources/resource_provider.h"
 
 namespace cc {
 
 class CC_EXPORT RenderPassDrawQuad : public DrawQuad {
  public:
   RenderPassDrawQuad();
-  virtual ~RenderPassDrawQuad();
+  ~RenderPassDrawQuad() override;
 
   void SetNew(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& visible_rect,
               RenderPassId render_pass_id,
               ResourceProvider::ResourceId mask_resource_id,
               const gfx::Vector2dF& mask_uv_scale,
               const gfx::Size& mask_texture_size,
               const FilterOperations& filters,
               const gfx::Vector2dF& filters_scale,
@@ skipping 26 matching lines @@
   // content-to-target-space scale, and device pixel ratio.
   gfx::Vector2dF filters_scale;
 
   // Post-processing filters, applied to the pixels showing through the
   // background of the render pass, from behind it.
   FilterOperations background_filters;
 
   // Helper function to generate the normalized uv rect.
   gfx::RectF MaskUVRect() const;
 
-  virtual void IterateResources(const ResourceIteratorCallback& callback)
-      override;
+  void IterateResources(const ResourceIteratorCallback& callback) override;
 
   static const RenderPassDrawQuad* 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_RENDER_PASS_DRAW_QUAD_H_