cc: Delay start of scrollbar animation setNeedsRedraw.

cc/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_LAYER_TREE_IMPL_H_
 #define CC_LAYER_TREE_IMPL_H_
 
 #include "base/hash_tables.h"
 #include "base/values.h"
 #include "cc/layer_impl.h"
@@ skipping 83 matching lines @@
   }
 
   HeadsUpDisplayLayerImpl* hud_layer() { return hud_layer_; }
   void set_hud_layer(HeadsUpDisplayLayerImpl* layer_impl) {
     hud_layer_ = layer_impl;
   }
 
   LayerImpl* RootScrollLayer() const;
   LayerImpl* RootClipLayer() const;
   LayerImpl* CurrentlyScrollingLayer() const;
-  void set_currently_scrolling_layer(LayerImpl* layer) {
-    currently_scrolling_layer_ = layer;
-  }
-
+  void SetCurrentlyScrollingLayer(LayerImpl* layer);
   void ClearCurrentlyScrollingLayer();
 
   void FindRootScrollLayer();
   void UpdateMaxScrollOffset();
 
   SkColor background_color() const { return background_color_; }
   void set_background_color(SkColor color) { background_color_ = color; }
 
   bool has_transparent_background() const {
     return has_transparent_background_;
@@ skipping 110 matching lines @@
   // In impl-side painting mode, this is true when the tree may contain
   // structural differences relative to the active tree.
   bool needs_full_tree_sync_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }
 
 #endif  // CC_LAYER_TREE_IMPL_H_