[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/network/RequestTimingView.js

 /*
  * Copyright (C) 2010 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 71 matching lines @@
     __proto__: WebInspector.VBox.prototype
 }
 
 
 /**
  * @param {!WebInspector.NetworkRequest} request
  * @return {!Element}
  */
 WebInspector.RequestTimingView.createTimingTable = function(request)
 {
-    var tableElement = document.createElementWithClass("table", "network-timing-table");
+    var tableElement = createElementWithClass("table", "network-timing-table");
     tableElement.createChild("colgroup").createChild("col", "labels");
 
     /**
      * @param {string} title
      * @param {string} className
      * @param {number} start
      * @param {number} end
      */
     function addRow(title, className, start, end)
     {
@@ skipping 63 matching lines @@
         addRow(WebInspector.UIString("Content Download"), "receiving", (request.responseReceivedTime - timing.requestTime) * 1000, total);
 
     if (!request.finished) {
         var cell = tableElement.createChild("tr").createChild("td", "caution");
         cell.colSpan = 2;
         cell.createTextChild(WebInspector.UIString("CAUTION: request is not finished yet!"));
     }
 
     return tableElement;
 }