[not for review - epic CL] Adding Elastic+Momentum+Layered scrolling to views::ScrollView

cc/trees/layer_tree_host_common.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_TREES_LAYER_TREE_HOST_COMMON_H_
 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_
 
 #include <stddef.h>
 
 #include <limits>
@@ skipping 128 matching lines @@
 
   template <typename Function>
   static void CallFunctionForEveryLayer(LayerTreeImpl* layer,
                                         const Function& function);
 
   struct CC_EXPORT ScrollUpdateInfo {
     int layer_id;
     // TODO(miletus): Use ScrollOffset once LayerTreeHost/Blink fully supports
     // franctional scroll offset.
     gfx::Vector2d scroll_delta;
+    gfx::ScrollOffset overscroll;
 
     ScrollUpdateInfo();
 
     bool operator==(const ScrollUpdateInfo& other) const;
 
     void ToProtobuf(proto::ScrollUpdateInfo* proto) const;
     void FromProtobuf(const proto::ScrollUpdateInfo& proto);
   };
 };
 
@@ skipping 41 matching lines @@
     function(tree_impl->LayerById(id));
   }
 }
 
 CC_EXPORT PropertyTrees* GetPropertyTrees(Layer* layer);
 CC_EXPORT PropertyTrees* GetPropertyTrees(LayerImpl* layer);
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_COMMON_H_