Refactor Scroll Customization to share cc::ScrollStateData with blink.

cc/trees/layer_tree_impl.cc

 // 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.
 
 #include "cc/trees/layer_tree_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1842 matching lines @@
     selection->end = ComputeViewportSelectionBound(
         selection_.end,
         selection_.end.layer_id ? LayerById(selection_.end.layer_id) : NULL,
         device_scale_factor(), property_trees_.transform_tree,
         property_trees_.clip_tree, use_property_trees);
   }
 }
 
 void LayerTreeImpl::InputScrollAnimationFinished() {
   // TODO(majidvp): We should pass in the original starting scroll position here
-  ScrollState scroll_state(0, 0, 0, 0, 0, 0, false, false, false);
+  ScrollStateData scroll_state_data;
+  ScrollState scroll_state(scroll_state_data);
   layer_tree_host_impl_->ScrollEnd(&scroll_state);
 }
 
 bool LayerTreeImpl::SmoothnessTakesPriority() const {
   return layer_tree_host_impl_->GetTreePriority() == SMOOTHNESS_TAKES_PRIORITY;
 }
 
 VideoFrameControllerClient* LayerTreeImpl::GetVideoFrameControllerClient()
     const {
   return layer_tree_host_impl_;
@@ skipping 176 matching lines @@
                                                    const gfx::BoxF& box,
                                                    gfx::BoxF* bounds) const {
   *bounds = gfx::BoxF();
   return layer_tree_host_impl_->animation_host()
              ? layer_tree_host_impl_->animation_host()
                    ->TransformAnimationBoundsForBox(layer->id(), box, bounds)
              : true;
 }
 
 }  // namespace cc