[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/audits/AuditFormatters.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 25 matching lines @@
 }
 
 WebInspector.AuditFormatters.Registry = {
 
     /**
      * @param {string} text
      * @return {!Text}
      */
     text: function(text)
     {
-        return document.createTextNode(text);
+        return createTextNode(text);
     },
 
     /**
      * @param {string} snippetText
      * @return {!Element}
      */
     snippet: function(snippetText)
     {
-        var div = document.createElement("div");
+        var div = createElement("div");
         div.textContent = snippetText;
         div.className = "source-code";
         return div;
     },
 
     /**
      * @return {!Element}
      */
     concat: function()
     {
-        var parent = document.createElement("span");
+        var parent = createElement("span");
         for (var arg = 0; arg < arguments.length; ++arg)
             parent.appendChild(WebInspector.auditFormatters.apply(arguments[arg]));
         return parent;
     },
 
     /**
      * @param {string} url
      * @param {string=} displayText
      * @param {boolean=} allowExternalNavigation
      * @return {!Element}
      */
     url: function(url, displayText, allowExternalNavigation)
     {
-        var a = document.createElement("a");
+        var a = createElement("a");
         a.href = sanitizeHref(url);
         a.title = url;
         a.textContent = displayText || url;
         if (allowExternalNavigation)
             a.target = "_blank";
         return a;
     },
 
     /**
      * @param {string} url
@@ skipping 53 matching lines @@
     {
         if (value instanceof Array)
             return value.map(this.partiallyApply.bind(this, formatters, thisArgument));
         if (typeof value === "object" && typeof formatters[value.type] === "function" && value.arguments)
             return formatters[value.type].apply(thisArgument, value.arguments);
         return value;
     }
 }
 
 WebInspector.auditFormatters = new WebInspector.AuditFormatters();