Avoid exposing gl bindings through cc public API headers

cc/content_layer_updater.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_CONTENT_LAYER_UPDATER_H_
 #define CC_CONTENT_LAYER_UPDATER_H_
 
 #include "cc/cc_export.h"
 #include "cc/layer_updater.h"
+#include "ui/gfx/rect.h"
 
 class SkCanvas;
 
 namespace cc {
 
 class LayerPainter;
 
 // Base class for BitmapContentLayerUpdater and
 // SkPictureContentLayerUpdater that reduces code duplication between
 // their respective paintContents implementations.
 class CC_EXPORT ContentLayerUpdater : public LayerUpdater {
 protected:
     explicit ContentLayerUpdater(scoped_ptr<LayerPainter>);
     virtual ~ContentLayerUpdater();
 
     void paintContents(SkCanvas*, const gfx::Rect& contentRect, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats&);
     const gfx::Rect& contentRect() const { return m_contentRect; }
 
 private:
     gfx::Rect m_contentRect;
     scoped_ptr<LayerPainter> m_painter;
 };
 
 }  // namespace cc
 
 #endif  // CC_CONTENT_LAYER_UPDATER_H_