[Devtools] Bug fix of event dividers not showing in network panel

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 489 matching lines @@
     addFilmStripFrames: function(times)
     {
         this._columns.addEventDividers(times, "network-frame-divider");
     },
 
     /**
      * @param {number} time
      */
     selectFilmStripFrame: function(time)
     {
-        for (var divider of this._eventDividers)
-            divider.element.classList.toggle("network-frame-divider-selected", divider.time === time);
+        this._columns.selectFilmStripFrame(time);
     },
 
     clearFilmStripFrame: function()
     {
-        for (var divider of this._eventDividers)
-            divider.element.classList.toggle("network-frame-divider-selected", false);
+        this._columns.clearFilmStripFrame();
     },
 
     _refreshIfNeeded: function()
     {
         if (this._needsRefresh)
             this.refresh();
     },
 
     _invalidateAllItems: function()
     {
@@ skipping 164 matching lines @@
         var nodes = this._nodesByRequestId.valuesArray();
         for (var i = 0; i < nodes.length; ++i)
             nodes[i].dispose();
 
         this._nodesByRequestId.clear();
         this._staleRequestIds = {};
         this._resetSuggestionBuilder();
 
         this._mainRequestLoadTime = -1;
         this._mainRequestDOMContentLoadedTime = -1;
-        this._eventDividers = [];
 
         if (this._dataGrid) {
             this._dataGrid.rootNode().removeChildren();
             this._updateSummaryBar();
         }
     },
 
     /**
      * @param {string} filterString
      */
@@ skipping 1104 matching lines @@
  * @return {boolean}
  */
 WebInspector.NetworkLogView._requestTimeFilter = function(windowStart, windowEnd, request)
 {
     if (request.issueTime() > windowEnd)
         return false;
     if (request.endTime !== -1 && request.endTime < windowStart)
         return false;
     return true;
 }