Arrange compositor scrolling into scroll customization format

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 <map>
 #include <set>
 #include <string>
@@ skipping 49 matching lines @@
 class OpacityTree;
 class PrioritizedTile;
 class RenderPass;
 class RenderPassId;
 class Renderer;
 class ScrollbarAnimationController;
 class ScrollbarLayerImplBase;
 class SimpleEnclosedRegion;
 class Tile;
 class TransformTree;
+class ScrollState;
 
 struct AppendQuadsData;
 
 enum DrawMode {
   DRAW_MODE_NONE,
   DRAW_MODE_HARDWARE,
   DRAW_MODE_SOFTWARE,
   DRAW_MODE_RESOURCELESS_SOFTWARE
 };
 
@@ skipping 62 matching lines @@
   LayerImpl* scroll_parent() { return scroll_parent_; }
   const LayerImpl* scroll_parent() const { return scroll_parent_; }
 
   void SetScrollChildren(std::set<LayerImpl*>* children);
 
   std::set<LayerImpl*>* scroll_children() { return scroll_children_.get(); }
   const std::set<LayerImpl*>* scroll_children() const {
     return scroll_children_.get();
   }
 
+  void DistributeScroll(ScrollState* scroll_state);
+  void ApplyScroll(ScrollState* scroll_state);
+
   void set_property_tree_sequence_number(int sequence_number) {}
 
   void SetTransformTreeIndex(int index);
   int transform_tree_index() const { return transform_tree_index_; }
 
   void SetClipTreeIndex(int index);
   int clip_tree_index() const { return clip_tree_index_; }
 
   void SetOpacityTreeIndex(int index);
   int opacity_tree_index() const { return opacity_tree_index_; }
@@ skipping 701 matching lines @@
   bool visited_;
   bool layer_or_descendant_is_drawn_;
   bool sorted_for_recursion_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_