| Index: cc/layer_tree_impl.h
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| diff --git a/cc/layer_tree_impl.h b/cc/layer_tree_impl.h
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| index 31d5a67e8a9d27010ff93592585ae390221ad5e4..c1266b6a45f3c58f39ccb5dccef085fe581113ea 100644
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| --- a/cc/layer_tree_impl.h
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| +++ b/cc/layer_tree_impl.h
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| @@ -133,7 +133,10 @@ class CC_EXPORT LayerTreeImpl {
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|  
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|    const LayerList& RenderSurfaceLayerList() const;
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|  
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| +  // These return the size of the root scrollable area and the size of
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| +  // the user-visible scrolling viewport, in CSS layout coordinates.
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|    gfx::Size ScrollableSize() const;
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| +  gfx::SizeF ScrollableViewportSize() const;
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|  
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|    LayerImpl* LayerById(int id);
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|  
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| 
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