[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/components/FlameChart.js

 /**
  * Copyright (C) 2013 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 1034 matching lines @@
         return Math.min(this._canvas.width, Math.max(0, value));
     },
 
     _levelToHeight: function(level)
     {
          return this._baseHeight - level * this._barHeightDelta;
     },
 
     _buildEntryInfo: function(entryInfo)
     {
-        var infoTable = document.createElementWithClass("table", "info-table");
+        var infoTable = createElementWithClass("table", "info-table");
         for (var i = 0; i < entryInfo.length; ++i) {
             var row = infoTable.createChild("tr");
             row.createChild("td", "title").textContent = entryInfo[i].title;
             row.createChild("td").textContent = entryInfo[i].text;
         }
         return infoTable;
     },
 
     /**
      * @param {!CanvasRenderingContext2D} context
@@ skipping 112 matching lines @@
     {
         this._highlightedMarkerIndex = -1;
         this._highlightedEntryIndex = -1;
         this._selectedEntryIndex = -1;
         this._textWidth = {};
         this.update();
     },
 
     __proto__: WebInspector.HBox.prototype
 }