cc: Scale checkerboard quads by the device scale factor.

cc/quads/checkerboard_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_CHECKERBOARD_DRAW_QUAD_H_
 #define CC_QUADS_CHECKERBOARD_DRAW_QUAD_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/quads/draw_quad.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace cc {
 
 class CC_EXPORT CheckerboardDrawQuad : public DrawQuad {
  public:
   CheckerboardDrawQuad();
 
   void SetNew(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& visible_rect,
-              SkColor color);
+              SkColor color,
+              float scale);
 
   void SetAll(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               const gfx::Rect& visible_rect,
               bool needs_blending,
-              SkColor color);
+              SkColor color,
+              float scale);
 
   SkColor color;
+  float scale;
 
   void IterateResources(const ResourceIteratorCallback& callback) override;
 
   static const CheckerboardDrawQuad* MaterialCast(const DrawQuad*);
 
  private:
   void ExtendValue(base::trace_event::TracedValue* value) const override;
 };
 
 }  // namespace cc
 
 #endif  // CC_QUADS_CHECKERBOARD_DRAW_QUAD_H_