cc: Move TryScroll from LayerImpl to LayerTreeHostImpl

cc/trees/property_tree.h

 // Copyright 2014 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_PROPERTY_TREE_H_
 #define CC_TREES_PROPERTY_TREE_H_
 
 #include <stddef.h>
 
 #include <vector>
@@ skipping 257 matching lines @@
   ScrollNodeData();
 
   bool scrollable;
   uint32_t main_thread_scrolling_reasons;
   bool contains_non_fast_scrollable_region;
   gfx::Size scroll_clip_layer_bounds;
   gfx::Size bounds;
   bool max_scroll_offset_affected_by_page_scale;
   bool is_inner_viewport_scroll_layer;
   bool is_outer_viewport_scroll_layer;
+  gfx::Vector2dF offset_to_transform_parent;
+  bool should_flatten;
+  int transform_id;
 
   bool operator==(const ScrollNodeData& other) const;
 
   void ToProtobuf(proto::TreeNode* proto) const;
   void FromProtobuf(const proto::TreeNode& proto);
 };
 
 typedef TreeNode<ScrollNodeData> ScrollNode;
 
 class PropertyTrees;
@@ skipping 235 matching lines @@
  public:
   ScrollTree();
   ~ScrollTree() override;
 
   bool operator==(const ScrollTree& other) const;
 
   void ToProtobuf(proto::PropertyTree* proto) const;
   void FromProtobuf(const proto::PropertyTree& proto);
 
   gfx::ScrollOffset MaxScrollOffset(int scroll_node_id) const;
+  gfx::Transform ScreenSpaceTransform(int scroll_node_id) const;
 };
 
 class CC_EXPORT PropertyTrees final {
  public:
   PropertyTrees();
   ~PropertyTrees();
 
   bool operator==(const PropertyTrees& other) const;
   PropertyTrees& operator=(const PropertyTrees& from);
 
@@ skipping 26 matching lines @@
 
  private:
   gfx::Vector2dF inner_viewport_container_bounds_delta_;
   gfx::Vector2dF outer_viewport_container_bounds_delta_;
   gfx::Vector2dF inner_viewport_scroll_bounds_delta_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROPERTY_TREE_H_