Create PageScaleAnimation after ImplTree is activated.

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 <list>
 #include <set>
@@ skipping 45 matching lines @@
 class LayerTreeHostSingleThreadClient;
 class PrioritizedResource;
 class PrioritizedResourceManager;
 class Region;
 class RenderingStatsInstrumentation;
 class ResourceProvider;
 class ResourceUpdateQueue;
 class SharedBitmapManager;
 class TopControlsManager;
 class UIResourceRequest;
+struct PendingPageScaleAnimation;
 struct RenderingStats;
 struct ScrollAndScaleSet;
 
 // Provides information on an Impl's rendering capabilities back to the
 // LayerTreeHost.
 struct CC_EXPORT RendererCapabilities {
   RendererCapabilities(ResourceFormat best_texture_format,
                        bool allow_partial_texture_updates,
                        int max_texture_size,
                        bool using_shared_memory_resources);
@@ skipping 350 matching lines @@
 
   // If set, this texture is used to fill in the parts of the screen not
   // covered by layers.
   scoped_ptr<ScopedUIResource> overhang_ui_resource_;
 
   typedef ScopedPtrVector<PrioritizedResource> TextureList;
   size_t partial_texture_update_requests_;
 
   scoped_ptr<AnimationRegistrar> animation_registrar_;
 
-  struct PendingPageScaleAnimation {
-    gfx::Vector2d target_offset;
-    bool use_anchor;
-    float scale;
-    base::TimeDelta duration;
-  };
   scoped_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
   bool in_paint_layer_contents_;
 
   static const int kTotalFramesToUseForLCDTextMetrics = 50;
   int total_frames_used_for_lcd_text_metrics_;
 
   struct LCDTextMetrics {
     LCDTextMetrics()
         : total_num_cc_layers(0),
@@ skipping 23 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_