[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/audits/AuditsPanel.js

 /*
  * Copyright (C) 2012 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 409 matching lines @@
     },
 
     /**
      * @param {string} format
      * @param {...*} vararg
      * @return {!WebInspector.AuditRuleResult}
      */
     addFormatted: function(format, vararg)
     {
         var substitutions = Array.prototype.slice.call(arguments, 1);
-        var fragment = document.createDocumentFragment();
+        var fragment = createDocumentFragment();
 
         function append(a, b)
         {
             if (!(b instanceof Node))
-                b = document.createTextNode(b);
+                b = createTextNode(b);
             a.appendChild(b);
             return a;
         }
 
         var formattedResult = String.format(format, substitutions, this._formatters, fragment, append).formattedResult;
         if (formattedResult instanceof Node)
             formattedResult.normalize();
         return this.addChild(formattedResult);
     }
 }
@@ skipping 106 matching lines @@
 }
 
 // Contributed audit rules should go into this namespace.
 WebInspector.AuditRules = {};
 
 /**
  * Contributed audit categories should go into this namespace.
  * @type {!Object.<string, function(new:WebInspector.AuditCategory)>}
  */
 WebInspector.AuditCategories = {};