Pass accurate contentsScale to LayerImpl.

cc/tiled_layer.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 TiledLayerChromium_h
 #define TiledLayerChromium_h
 
-#include "cc/layer.h"
+#include "cc/contents_scaling_layer.h"
 #include "cc/layer_updater.h"
 #include "cc/layer_tiling_data.h"
 
 namespace cc {
 class UpdatableTile;
 
-class TiledLayer : public Layer {
+class TiledLayer : public ContentsScalingLayer {
 public:
     enum TilingOption { AlwaysTile, NeverTile, AutoTile };
 
     virtual void setIsMask(bool) OVERRIDE;
 
     virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
 
     virtual bool drawsContent() const OVERRIDE;
-    virtual bool needsContentsScale() const OVERRIDE;
-
-    virtual IntSize contentBounds() const OVERRIDE;
 
     virtual void setNeedsDisplayRect(const FloatRect&) OVERRIDE;
 
     virtual void setUseLCDText(bool) OVERRIDE;
 
     virtual void setLayerTreeHost(LayerTreeHost*) OVERRIDE;
 
     virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
 
     virtual Region visibleContentOpaqueRegion() const OVERRIDE;
@@ skipping 60 matching lines @@
     IntRect m_predictedVisibleRect;
     IntRect m_previousVisibleRect;
     IntSize m_previousContentBounds;
 
     TilingOption m_tilingOption;
     scoped_ptr<LayerTilingData> m_tiler;
 };
 
 }
 #endif