Delete LayerImpl::GetRenderSurface.

cc/layers/layer_impl.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_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 197 matching lines @@
 
   void SetShouldCheckBackfaceVisibility(bool should_check_backface_visibility) {
     should_check_backface_visibility_ = should_check_backface_visibility;
   }
   bool should_check_backface_visibility() const {
     return should_check_backface_visibility_;
   }
 
   bool ShowDebugBorders(DebugBorderType type) const;
 
-  // TODO(http://crbug.com/557160): Currently SPv2 creates dummy layers for the
-  // sole purpose of representing a render surface. Once that dependency is
-  // removed, also remove dummy layers from PaintArtifactCompositor.
-  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.
   RenderSurfaceImpl* render_target();
   const RenderSurfaceImpl* render_target() const;
 
   DrawProperties& draw_properties() { return draw_properties_; }
   const DrawProperties& draw_properties() const { return draw_properties_; }
 
   gfx::Transform DrawTransform() const;
   gfx::Transform ScreenSpaceTransform() const;
@@ skipping 329 matching lines @@
   bool needs_show_scrollbars_ : 1;
 
   bool raster_even_if_not_in_rsll_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_