cc: Remove friend class TransformTree from PropertyTree

cc/trees/property_tree.cc

 // 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.
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 112 matching lines @@
 #if DCHECK_IS_ON()
   TransformTree tree;
   // TODO(jaydasika) : Move tests that expect source_to_parent_updates_allowed
   // to be true on impl thread to main thread and set it to is_main_thread here.
   tree.source_to_parent_updates_allowed_ = source_to_parent_updates_allowed_;
   DCHECK(tree == *this);
 #endif
 }
 
 void TransformTree::set_needs_update(bool needs_update) {
-  if (needs_update && !needs_update_)
+  if (needs_update && !PropertyTree<TransformNode>::needs_update())
     property_trees()->UpdateTransformTreeUpdateNumber();
-  needs_update_ = needs_update;
+  PropertyTree<TransformNode>::set_needs_update(needs_update);
 }
 
 bool TransformTree::ComputeTranslation(int source_id,
                                        int dest_id,
                                        gfx::Transform* transform) const {
   transform->MakeIdentity();
   if (source_id == dest_id)
     return true;
 
   const TransformNode* dest = Node(dest_id);
@@ skipping 1968 matching lines @@
   const EffectNode* effect_node = effect_tree.Node(effect_id);
 
   if (effect_node->surface_contents_scale.x() != 0.0 &&
       effect_node->surface_contents_scale.y() != 0.0)
     screen_space_transform.Scale(1.0 / effect_node->surface_contents_scale.x(),
                                  1.0 / effect_node->surface_contents_scale.y());
   return screen_space_transform;
 }
 
 }  // namespace cc