Convert cc::PropertyTree to use a flat_map.

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 52 matching lines @@
   return node.id;
 }
 
 template <typename T>
 void PropertyTree<T>::clear() {
   needs_update_ = false;
   nodes_.clear();
   nodes_.push_back(T());
   back()->id = kRootNodeId;
   back()->parent_id = kInvalidNodeId;
-  owning_layer_id_to_node_index.clear();
+  owning_layer_id_to_node_index_.clear();
 
 #if DCHECK_IS_ON()
   PropertyTree<T> tree;
   DCHECK(tree == *this);
 #endif
 }
 
 template <typename T>
 bool PropertyTree<T>::operator==(const PropertyTree<T>& other) const {
   return nodes_ == other.nodes() && needs_update_ == other.needs_update() &&
-         owning_layer_id_to_node_index == other.owning_layer_id_to_node_index;
+         owning_layer_id_to_node_index_ == other.owning_layer_id_to_node_index_;
 }
 
 template <typename T>
 void PropertyTree<T>::AsValueInto(base::trace_event::TracedValue* value) const {
   value->BeginArray("nodes");
   for (const auto& node : nodes_) {
     value->BeginDictionary();
     node.AsValueInto(value);
     value->EndDictionary();
   }
@@ skipping 2016 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