CC Animations: Port Impl-only-scrolling to use compositor animation timelines.

cc/trees/layer_tree_host.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_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 312 matching lines @@
   void SetLayerOpacityMutated(int layer_id,
                               bool active_tree,
                               float opacity) override;
   void SetLayerTransformMutated(int layer_id,
                                 bool active_tree,
                                 const gfx::Transform& transform) override;
   void SetLayerScrollOffsetMutated(
       int layer_id,
       bool active_tree,
       const gfx::ScrollOffset& scroll_offset) override;
+  gfx::ScrollOffset GetScrollOffsetForAnimation(int layer_id) const override;
 
   bool IsAnimatingFilterProperty(const Layer* layer) const;
   bool IsAnimatingOpacityProperty(const Layer* layer) const;
   bool IsAnimatingTransformProperty(const Layer* layer) const;
   bool AnimationsPreserveAxisAlignment(const Layer* layer) const;
   bool HasAnyAnimation(const Layer* layer) const;
   bool HasActiveAnimation(const Layer* layer) const;
 
  protected:
   LayerTreeHost(LayerTreeHostClient* client,
@@ skipping 144 matching lines @@
 
   uint32_t surface_id_namespace_;
   uint32_t next_surface_sequence_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_