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

cc/trees/layer_tree_host_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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 243 matching lines @@
   void SetLayerOpacityMutated(int layer_id,
                               LayerTreeType tree_type,
                               float opacity) override;
   void SetLayerTransformMutated(int layer_id,
                                 LayerTreeType tree_type,
                                 const gfx::Transform& transform) override;
   void SetLayerScrollOffsetMutated(
       int layer_id,
       LayerTreeType tree_type,
       const gfx::ScrollOffset& scroll_offset) override;
+  void ScrollOffsetAnimationFinished() override;
+  gfx::ScrollOffset GetScrollOffsetForAnimation(int layer_id) const override;
 
   virtual void PrepareTiles();
 
   // Returns DRAW_SUCCESS unless problems occured preparing the frame, and we
   // should try to avoid displaying the frame. If PrepareToDraw is called,
   // DidDrawAllLayers must also be called, regardless of whether DrawLayers is
   // called between the two.
   virtual DrawResult PrepareToDraw(FrameData* frame);
   virtual void DrawLayers(FrameData* frame);
   // Must be called if and only if PrepareToDraw was called.
@@ skipping 541 matching lines @@
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   scoped_ptr<Viewport> viewport_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_