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

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

 // Copyright 2016 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.
 /**
  * @unrestricted
  */
 Network.NetworkLogViewColumns = class {
   /**
    * @param {!Network.NetworkLogView} networkLogView
    * @param {!Network.NetworkTransferTimeCalculator} timeCalculator
@@ skipping 270 matching lines @@
       this._waterfallColumnSortIcon.classList.remove('sort-ascending', 'sort-descending');
 
       if (this._dataGrid.sortOrder() === UI.DataGrid.Order.Ascending)
         this._waterfallColumnSortIcon.classList.add('sort-ascending');
       else
         this._waterfallColumnSortIcon.classList.add('sort-descending');
 
       this._waterfallRequestsAreStale = true;
       var sortFunction = Network.NetworkDataGridNode.RequestPropertyComparator.bind(null, this._activeWaterfallSortId);
       this._dataGrid.sortNodes(sortFunction, !this._dataGrid.isSortOrderAscending());
-      this._networkLogView.dataGridSorted();
       return;
     }
 
     var columnConfig = this._columns.find(columnConfig => columnConfig.id === columnId);
     if (!columnConfig || !columnConfig.sortingFunction)
       return;
 
     this._dataGrid.sortNodes(columnConfig.sortingFunction, !this._dataGrid.isSortOrderAscending());
     this._networkLogView.dataGridSorted();
   }
@@ skipping 516 matching lines @@
 /**
  * @enum {string}
  */
 Network.NetworkLogViewColumns.WaterfallSortIds = {
   StartTime: 'startTime',
   ResponseTime: 'responseReceivedTime',
   EndTime: 'endTime',
   Duration: 'duration',
   Latency: 'latency'
 };