DevTools: do not allow using 'this' before call into super.

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.
 
 /**
  * @constructor
  * @param {!WebInspector.NetworkLogView} networkLogView
  * @param {!WebInspector.Setting} networkLogLargeRowsSetting
  */
 WebInspector.NetworkLogViewColumns = function(networkLogView, networkLogLargeRowsSetting)
@@ skipping 384 matching lines @@
                 columnConfig.titleDOMFragment = this._makeHeaderFragment(columnConfig.title, columnConfig.subtitle);
             this._columns.push(columnConfig);
         }
         this._loadColumns();
 
         /** @type {!Map<string, !WebInspector.NetworkTimeCalculator>} */
         this._calculatorsMap = new Map();
         this._calculatorsMap.set(WebInspector.NetworkLogViewColumns._calculatorTypes.Time, timeCalculator);
         this._calculatorsMap.set(WebInspector.NetworkLogViewColumns._calculatorTypes.Duration, durationCalculator);
 
-        this._popoverHelper = new WebInspector.PopoverHelper(this._networkLogView.element, this._getPopoverAnchor.bind(this), this._showPopover.bind(this), this._onHidePopover.bind(this));
-
+        this._popoverHelper = new WebInspector.PopoverHelper(this._networkLogView.element);
+        this._popoverHelper.initializeCallbacks(this._getPopoverAnchor.bind(this), this._showPopover.bind(this), this._onHidePopover.bind(this));
         this._dataGrid = new WebInspector.SortableDataGrid(this._columns.map(WebInspector.NetworkLogViewColumns._convertToDataGridDescriptor));
 
         this._updateColumns();
         this._dataGrid.addEventListener(WebInspector.DataGrid.Events.SortingChanged, this._sortHandler, this);
         this._dataGrid.addEventListener(WebInspector.DataGrid.Events.ColumnsResized, this.updateDividersIfNeeded, this);
 
         this._timelineGrid = new WebInspector.TimelineGrid();
         this._timelineGrid.element.classList.add("network-timeline-grid");
         if (!Runtime.experiments.isEnabled("canvasNetworkTimeline"))
             this._dataGrid.element.appendChild(this._timelineGrid.element);
@@ skipping 414 matching lines @@
             divider.element.classList.toggle("network-frame-divider-selected", false);
     },
 
     _updateRowsSize: function()
     {
         if (Runtime.experiments.isEnabled("canvasNetworkTimeline"))
             return;
         this._timelineGrid.element.classList.toggle("small", !this._networkLogLargeRowsSetting.get());
     }
 };