Create PageScaleAnimation after ImplTree is activated.

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 <set>
 #include <string>
@@ skipping 26 matching lines @@
 class LayerTreeSettings;
 class MemoryHistory;
 class OutputSurface;
 class PageScaleAnimation;
 class PaintTimeCounter;
 class PictureLayerImpl;
 class Proxy;
 class ResourceProvider;
 class TileManager;
 class UIResourceRequest;
+struct PendingPageScaleAnimation;
 struct RendererCapabilities;
 struct SelectionHandle;
 
 typedef std::list<UIResourceRequest> UIResourceRequestQueue;
 
 class CC_EXPORT LayerTreeImpl {
  public:
   static scoped_ptr<LayerTreeImpl> create(
       LayerTreeHostImpl* layer_tree_host_impl) {
     return make_scoped_ptr(new LayerTreeImpl(layer_tree_host_impl));
@@ skipping 246 matching lines @@
   float top_controls_delta() const {
     return top_controls_delta_;
   }
   float sent_top_controls_delta() const {
     return sent_top_controls_delta_;
   }
   float total_top_controls_content_offset() const {
     return top_controls_content_offset_ + top_controls_delta_;
   }
 
-  void SetPageScaleAnimation(
-      const gfx::Vector2d& target_offset,
-      bool anchor_point,
-      float page_scale,
-      base::TimeDelta duration);
-  scoped_ptr<PageScaleAnimation> TakePageScaleAnimation();
+  void SetPendingPageScaleAnimation(
+      scoped_ptr<PendingPageScaleAnimation> pending_animation);
+  scoped_ptr<PendingPageScaleAnimation> TakePendingPageScaleAnimation();
 
  protected:
   explicit LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl);
   void ReleaseResourcesRecursive(LayerImpl* current);
 
   LayerTreeHostImpl* layer_tree_host_impl_;
   int source_frame_number_;
   scoped_ptr<LayerImpl> root_layer_;
   HeadsUpDisplayLayerImpl* hud_layer_;
   LayerImpl* currently_scrolling_layer_;
@@ skipping 51 matching lines @@
   // viewport resize) in Blink. i.e. How much the viewport was shrunk by the top
   // controls.
   float top_controls_layout_height_;
 
   // The up-to-date content offset of the top controls, i.e. the amount that the
   // web contents have been shifted down from the top of the device viewport.
   float top_controls_content_offset_;
   float top_controls_delta_;
   float sent_top_controls_delta_;
 
-  scoped_ptr<PageScaleAnimation> page_scale_animation_;
+  scoped_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_