Remove scroll_clip_layer dependency from viewport layer tracking

third_party/WebKit/public/platform/WebLayerTreeView.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 121 matching lines @@
   virtual void CompositeAndReadbackAsync(
       WebCompositeAndReadbackAsyncCallback*) {}
 
   // Prevents updates to layer tree from becoming visible.
   virtual void SetDeferCommits(bool defer_commits) {}
 
   // Identify key viewport layers to the compositor.
   virtual void RegisterViewportLayers(
       const WebLayer* overscroll_elasticity_layer,
       const WebLayer* page_scale_layer,
+      const WebLayer* inner_viewport_container_layer,
+      const WebLayer* outer_viewport_container_layer,
       const WebLayer* inner_viewport_scroll_layer,
       const WebLayer* outer_viewport_scroll_layer) {}
   virtual void ClearViewportLayers() {}
 
   // Used to update the active selection bounds.
   virtual void RegisterSelection(const WebSelection&) {}
   virtual void ClearSelection() {}
 
   // Mutations are plumbed back to the layer tree via the mutator client.
   virtual void SetMutatorClient(std::unique_ptr<WebCompositorMutatorClient>) {}
@@ skipping 34 matching lines @@
   virtual void SetShowScrollBottleneckRects(bool) {}
 
   // ReportTimeCallback is a callback that should be fired when the
   // corresponding Swap completes (either with DidSwap or DidNotSwap).
   virtual void NotifySwapTime(ReportTimeCallback callback) {}
 };
 
 }  // namespace blink
 
 #endif  // WebLayerTreeView_h