cc: Rename LayerImpl::render_surface to GetRenderSurface

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 5435f37f1248fc4c3ac76da4e5ddaebca8520f51..d2b5c39f33bc9b37bb5be592f05d7294cd08f34c 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -123,9 +123,6 @@ class CC_EXPORT LayerImpl {
   void UpdatePropertyTreeTransformIsAnimated(bool is_animated);
   void UpdatePropertyTreeScrollOffset();
 
-  // For compatibility with Layer.
-  bool has_render_surface() const { return !!render_surface(); }
-
   LayerTreeImpl* layer_tree_impl() const { return layer_tree_impl_; }
 
   void PopulateSharedQuadState(SharedQuadState* state) const;
@@ -230,7 +227,7 @@ class CC_EXPORT LayerImpl {
 
   bool ShowDebugBorders() const;
 
-  RenderSurfaceImpl* render_surface() const;
+  RenderSurfaceImpl* GetRenderSurface() const;
 
   // The render surface which this layer draws into. This can be either owned by
   // the same layer or an ancestor of this layer.