cc: Remove code for drawing checkerboard quads, it's not used.

cc/blink/web_content_layer_impl.h

 // Copyright 2014 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_BLINK_WEB_CONTENT_LAYER_IMPL_H_
 #define CC_BLINK_WEB_CONTENT_LAYER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/blink/cc_blink_export.h"
 #include "cc/blink/web_layer_impl.h"
@@ skipping 12 matching lines @@
 namespace cc_blink {
 
 class WebContentLayerImpl : public blink::WebContentLayer,
                             public cc::ContentLayerClient {
  public:
   CC_BLINK_EXPORT explicit WebContentLayerImpl(blink::WebContentLayerClient*);
 
   // WebContentLayer implementation.
   virtual blink::WebLayer* layer();
   virtual void setDoubleSided(bool double_sided);
+  // TODO(danakj): Remove me.
   virtual void setDrawCheckerboardForMissingTiles(bool checkerboard);
 
  protected:
   virtual ~WebContentLayerImpl();
 
   // ContentLayerClient implementation.
   void PaintContents(SkCanvas* canvas,
                      const gfx::Rect& clip,
                      PaintingControlSetting painting_control) override;
   scoped_refptr<cc::DisplayItemList> PaintContentsToDisplayList(
       const gfx::Rect& clip,
       PaintingControlSetting painting_control) override;
   bool FillsBoundsCompletely() const override;
   size_t GetApproximateUnsharedMemoryUsage() const override;
 
   scoped_ptr<WebLayerImpl> layer_;
   blink::WebContentLayerClient* client_;
   bool draws_content_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebContentLayerImpl);
 };
 
 }  // namespace cc_blink
 
 #endif  // CC_BLINK_WEB_CONTENT_LAYER_IMPL_H_