cc/blimp: Add synchronization for scroll/scale state.

cc/trees/layer_tree.h

 // Copyright 2016 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_H_
 #define CC_TREES_LAYER_TREE_H_
 
 #include <memory>
 #include <unordered_map>
 #include <unordered_set>
@@ skipping 84 matching lines @@
   }
 
   void SetBrowserControlsHeight(float height, bool shrink);
   void SetBrowserControlsShownRatio(float ratio);
   void SetBottomControlsHeight(float height);
 
   void SetPageScaleFactorAndLimits(float page_scale_factor,
                                    float min_page_scale_factor,
                                    float max_page_scale_factor);
   float page_scale_factor() const { return inputs_.page_scale_factor; }
+  float min_page_scale_factor() const { return inputs_.min_page_scale_factor; }
+  float max_page_scale_factor() const { return inputs_.max_page_scale_factor; }
 
   void set_background_color(SkColor color) { inputs_.background_color = color; }
   SkColor background_color() const { return inputs_.background_color; }
 
   void set_has_transparent_background(bool transparent) {
     inputs_.has_transparent_background = transparent;
   }
 
   void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
                                bool use_anchor,
@@ skipping 59 matching lines @@
   gfx::Vector2dF elastic_overscroll() const { return elastic_overscroll_; }
 
   void UpdateHudLayer(bool show_hud_info);
   HeadsUpDisplayLayer* hud_layer() const { return hud_layer_.get(); }
 
   virtual void SetNeedsFullTreeSync();
   bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
 
   void SetPropertyTreesNeedRebuild();
 
-  void PushPropertiesTo(LayerTreeImpl* tree_impl);
+  void PushPropertiesTo(LayerTreeImpl* tree_impl,
+                        float unapplied_page_scale_delta);
 
   void ToProtobuf(proto::LayerTree* proto, bool inputs_only);
   void FromProtobuf(const proto::LayerTree& proto);
 
   AnimationHost* animation_host() const { return animation_host_.get(); }
 
   Layer* LayerByElementId(ElementId element_id) const;
   void RegisterElement(ElementId element_id,
                        ElementListType list_type,
                        Layer* layer);
@@ skipping 110 matching lines @@
   // external embedder.
   EnginePictureCache* engine_picture_cache_;
   ClientPictureCache* client_picture_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTree);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_H_