Impl thread smooth scrolling.

cc/trees/layer_tree_impl.h

 // Copyright 2012 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_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 71 matching lines @@
   LayerImpl* FindPendingTreeLayerById(int id);
   int MaxTextureSize() const;
   bool PinchGestureActive() const;
   base::TimeTicks CurrentFrameTimeTicks() const;
   base::TimeDelta begin_impl_frame_interval() const;
   void SetNeedsCommit();
   gfx::Size DrawViewportSize() const;
   scoped_ptr<ScrollbarAnimationController> CreateScrollbarAnimationController(
       LayerImpl* scrolling_layer);
   void DidAnimateScrollOffset();
+  void ScrollOffsetAnimationFinished();

[ajuma, 2014/07/08 18:45:32]

Since this is only going to get called for input-initiated scroll animations
rather than all scroll animations, something like 'InputScrollAnimationFinished'
might be a better name.

[skobes, 2014/07/08 21:21:58]

Done.

   bool use_gpu_rasterization() const;
   bool create_low_res_tiling() const;
 
   // Tree specific methods exposed to layer-impl tree.
   // ---------------------------------------------------------------------------
   void SetNeedsRedraw();
 
   // TODO(nduca): These are implemented in cc files temporarily, but will become
   // trivial accessors in a followup patch.
   const LayerTreeDebugState& debug_state() const;
@@ skipping 219 matching lines @@
 
   int render_surface_layer_list_id_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_