Revert of [Devtools] Moved flatten children to children nodes instead of datagrid

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 486 matching lines @@
    * @override
    * @return {!Array.<!Element>}
    */
   elementsToRestoreScrollPositionsFor() {
     if (!this._dataGrid)  // Not initialized yet.
       return [];
     return [this._dataGrid.scrollContainer];
   }
 
   _setupDataGrid() {
-    /** @type {!UI.SortableDataGrid} */
     this._dataGrid = this._columns.dataGrid();
     this._dataGrid.setRowContextMenuCallback(
         (contextMenu, node) => this.handleContextMenuForRequest(contextMenu, node.request()));
     this._dataGrid.setStickToBottom(true);
     this._dataGrid.setName('networkLog');
     this._dataGrid.setResizeMethod(UI.DataGrid.ResizeMethod.Last);
     this._dataGrid.element.classList.add('network-log-grid');
     this._dataGrid.element.addEventListener('mousedown', this._dataGridMouseDown.bind(this), true);
     this._dataGrid.element.addEventListener('mousemove', this._dataGridMouseMove.bind(this), true);
     this._dataGrid.element.addEventListener('mouseleave', this._dataGridMouseLeave.bind(this), true);
   }
 
   /**
    * @param {!Event} event
    */
   _dataGridMouseMove(event) {
-    var node = /** @type {?Network.NetworkDataGridNode} */ (
-        this._dataGrid.dataGridNodeFromNode(/** @type {!Node} */ (event.target)));
+    var node = this._dataGrid.dataGridNodeFromNode(event.target);
     var highlightInitiatorChain = event.shiftKey;
     this._setHoveredNode(node, highlightInitiatorChain);
     this._highlightInitiatorChain((highlightInitiatorChain && node) ? node.request() : null);
   }
 
   _dataGridMouseLeave() {
     this._setHoveredNode(null);
     this._highlightInitiatorChain(null);
   }
 
@@ skipping 243 matching lines @@
    * @override
    */
   willHide() {
     this._columns.willHide();
   }
 
   /**
    * @return {!Array<!Network.NetworkDataGridNode>}
    */
   flatNodesList() {
-    return this._dataGrid.rootNode().flattenChildren();
+    return this._dataGrid.flatNodesList();
   }
 
   _refresh() {
     this._needsRefresh = false;
 
     if (this._refreshRequestId) {
       this.element.window().cancelAnimationFrame(this._refreshRequestId);
       delete this._refreshRequestId;
     }
 
@@ skipping 916 matching lines @@
   Running: 'running',
   FromCache: 'from-cache'
 };
 
 /** @type {!Array<string>} */
 Network.NetworkLogView._searchKeys =
     Object.keys(Network.NetworkLogView.FilterType).map(key => Network.NetworkLogView.FilterType[key]);
 
 /** @typedef {function(!SDK.NetworkRequest): boolean} */
 Network.NetworkLogView.Filter;