[DevTools] Fix more frontend compiler errors

third_party/WebKit/Source/devtools/front_end/timeline/LayerTreeModel.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 246 matching lines @@
         if (this._domModel)
             this._domModel.pushNodesByBackendIdsToFrontend(requestedNodeIds, populateBackendNodeMap.bind(this));
 
         /**
          * @this {WebInspector.LayerTreeBase}
          * @param {?Map<number, ?WebInspector.DOMNode>} nodesMap
          */
         function populateBackendNodeMap(nodesMap)
         {
             if (nodesMap) {
                 for (var entry of nodesMap)

[lushnikov, 2016/03/04 22:49:18]

.keys()?

[kozy, 2016/03/04 23:18:50]

Done.

-                    this._backendNodeIdToNode.set(entry[0], entry[1]);
+                    this._backendNodeIdToNode.set(/** @type {number} */(entry[0]), /** @type {?WebInspector.DOMNode} */(entry[1]));
             }
             callback();
         }
     },
 
     /**
      * @param {!Object} viewportSize
      */
     setViewportSize: function(viewportSize)
     {
@@ skipping 96 matching lines @@
     },
 
     /**
      * @param {!Set<number>} nodeIdsToResolve
      * @param {!Object} seenNodeIds
      * @param {!WebInspector.TracingLayerPayload} payload
      */
     _extractNodeIdsToResolve: function(nodeIdsToResolve, seenNodeIds, payload)
     {
         var backendNodeId = payload.owner_node;
-        if (backendNodeId && !this._backendNodeIdToNode[backendNodeId])
+        if (backendNodeId && !this._backendNodeIdToNode.has(backendNodeId))
             nodeIdsToResolve.add(backendNodeId);
         for (var i = 0; payload.children && i < payload.children.length; ++i)
             this._extractNodeIdsToResolve(nodeIdsToResolve, seenNodeIds, payload.children[i]);
     },
 
     __proto__: WebInspector.LayerTreeBase.prototype
 }
 
 /**
   * @constructor
@@ skipping 877 matching lines @@
 WebInspector.LayerTreeModel.fromTarget = function(target)
 {
     if (!target.isPage())
         return null;
 
     var model = /** @type {?WebInspector.LayerTreeModel} */ (target.model(WebInspector.LayerTreeModel));
     if (!model)
         model = new WebInspector.LayerTreeModel(target);
     return model;
 }