Add more out of line copy ctors for complex classes.

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 <unordered_map>
@@ skipping 538 matching lines @@
   void FromProtobuf(const proto::PropertyTree& proto);
 
  private:
   void UpdateOpacities(EffectNode* node, EffectNode* parent_node);
   void UpdateIsDrawn(EffectNode* node, EffectNode* parent_node);
 };
 
 class CC_EXPORT ScrollTree final : public PropertyTree<ScrollNode> {
  public:
   ScrollTree();
+  ScrollTree(const ScrollTree& other);
   ~ScrollTree() override;
 
   ScrollTree& operator=(const ScrollTree& from);
   bool operator==(const ScrollTree& other) const;
 
   void ToProtobuf(proto::PropertyTree* proto) const;
   void FromProtobuf(const proto::PropertyTree& proto);
 
   void clear() override;
 
@@ skipping 43 matching lines @@
   void UpdateScrollOffsetMapEntry(int key,
                                   ScrollOffsetMap* new_scroll_offset_map,
                                   LayerTreeImpl* layer_tree_impl);
   gfx::ScrollOffset ClampScrollOffsetToLimits(gfx::ScrollOffset offset,
                                               ScrollNode* scroll_node) const;
 };
 
 class CC_EXPORT PropertyTrees final {
  public:
   PropertyTrees();
+  PropertyTrees(const PropertyTrees& other);
   ~PropertyTrees();
 
   bool operator==(const PropertyTrees& other) const;
   PropertyTrees& operator=(const PropertyTrees& from);
 
   void ToProtobuf(proto::PropertyTrees* proto) const;
   void FromProtobuf(const proto::PropertyTrees& proto);
 
   TransformTree transform_tree;
   EffectTree effect_tree;
@@ skipping 37 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_