cc : Add IsInIdtoIndexMap to property tres

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 2040 matching lines @@
         target_tree->effect_tree.Node(target_tree->effect_id_to_index_map[id]);
     float source_opacity = source_effect_node->data.opacity;
     float target_opacity = target_effect_node->data.opacity;
     if (source_opacity == target_opacity)
       continue;
     target_effect_node->data.opacity = source_opacity;
     target_tree->effect_tree.set_needs_update(true);
   }
 }
 
+bool PropertyTrees::IsInIdToIndexMap(TreeType tree_type, int id) {
+  std::unordered_map<int, int>* id_to_index_map = nullptr;
+  switch (tree_type) {
+    case TRANSFORM:
+      id_to_index_map = &transform_id_to_index_map;
+      break;
+    case EFFECT:
+      id_to_index_map = &effect_id_to_index_map;
+      break;
+    case CLIP:
+      id_to_index_map = &clip_id_to_index_map;
+      break;
+    case SCROLL:
+      id_to_index_map = &scroll_id_to_index_map;
+      break;
+  }
+  return id_to_index_map->find(id) != id_to_index_map->end();
+}
+
 void PropertyTrees::UpdateChangeTracking() {
   for (int id = 1; id < static_cast<int>(effect_tree.size()); ++id) {
     EffectNode* node = effect_tree.Node(id);
     EffectNode* parent_node = effect_tree.parent(node);
     effect_tree.UpdateEffectChanged(node, parent_node);
   }
   for (int i = 1; i < static_cast<int>(transform_tree.size()); ++i) {
     TransformNode* node = transform_tree.Node(i);
     TransformNode* parent_node = transform_tree.parent(node);
     TransformNode* source_node = transform_tree.Node(node->data.source_node_id);
@@ skipping 57 matching lines @@
   value->EndDictionary();
 
   value->BeginDictionary("scroll_tree");
   scroll_tree.AsValueInto(value.get());
   value->EndDictionary();
 
   return value;
 }
 
 }  // namespace cc