[Devtools] Changed ViewportDataGrid to use DataGrid for dom operations

third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotView.js

 /*
  * 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:
  *
  *     * 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 599 matching lines @@
    * @param {!Event} event
    * @return {?UI.PopoverRequest}
    */
   _getPopoverRequest(event) {
     var span = event.target.enclosingNodeOrSelfWithNodeName('span');
     var row = event.target.enclosingNodeOrSelfWithNodeName('tr');
     var target = this._profile.target();
     var runtimeModel = target ? target.model(SDK.RuntimeModel) : null;
     if (!row || !span || !target || !runtimeModel)
       return null;
-    var node = row[DataGrid.DataGrid._dataGridNodeSymbol];
+    var node = row._dataGridNode;
     var objectPopoverHelper;
     return {
       box: span.boxInWindow(),
       show: async popover => {
         var remoteObject = await node.queryObjectContent(target, 'popover');
         if (!remoteObject)
           return false;
         objectPopoverHelper = await ObjectUI.ObjectPopoverHelper.buildObjectPopover(remoteObject, popover);
         if (!objectPopoverHelper) {
           runtimeModel.releaseObjectGroup('popover');
@@ skipping 1482 matching lines @@
       var name = frameDiv.createChild('div');
       name.textContent = UI.beautifyFunctionName(frame.functionName);
       if (frame.scriptId) {
         var urlElement = this._linkifier.linkifyScriptLocation(
             this._target, String(frame.scriptId), frame.scriptName, frame.line - 1, frame.column - 1);
         frameDiv.appendChild(urlElement);
       }
     }
   }
 };