[Devtools] Moved DataGridNode's .parent property to proper getter/setter

third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 795 matching lines @@
         this._setHoveredNode(null);
 
       if (!isFilteredOut)
         nodesToRefresh.push(node);
       var request = node.request();
       this._timeCalculator.updateBoundaries(request);
       this._durationCalculator.updateBoundaries(request);
 
       node[Network.NetworkLogView._isFilteredOutSymbol] = isFilteredOut;
       var newParent = this._parentNodeForInsert(node);
-      var removeFromParent = node.parent && (isFilteredOut || node.parent !== newParent);
+      var removeFromParent = node.parent() && (isFilteredOut || node.parent() !== newParent);
       if (removeFromParent) {
-        var parent = node.parent;
+        var parent = node.parent();
         parent.removeChild(node);
         while (parent && !parent.hasChildren() && parent.dataGrid && parent.dataGrid.rootNode() !== parent) {
-          var grandparent = parent.parent;
+          var grandparent = parent.parent();
           grandparent.removeChild(parent);
           parent = grandparent;
         }
       }
 
       if (!newParent || isFilteredOut)
         continue;
 
       if (!newParent.dataGrid && !nodesToInsert.has(newParent)) {
         nodesToInsert.set(newParent, this._dataGrid.rootNode());
@@ skipping 960 matching lines @@
  */
 Network.NetworkGroupLookupInterface = function() {};
 
 Network.NetworkGroupLookupInterface.prototype = {
   /**
    * @param {!SDK.NetworkRequest} request
    * @return {?string}
    */
   lookup(request) {}
 };