[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/components/ShortcutsScreen.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 171 matching lines @@
         return this._joinNodes(keyName.split(" + ").map(this._createSpan.bind(this, "help-key")), plus);
     },
 
     /**
      * @param {string} className
      * @param {string} textContent
      * @return {!Element}
      */
     _createSpan: function(className, textContent)
     {
-        var node = document.createElement("span");
+        var node = createElement("span");
         node.className = className;
         node.textContent = textContent;
         return node;
     },
 
     /**
      * @param {!Array.<!Element>} nodes
      * @param {!Element} delimiter
      * @return {!Node}
      */
     _joinNodes: function(nodes, delimiter)
     {
-        var result = document.createDocumentFragment();
+        var result = createDocumentFragment();
         for (var i = 0; i < nodes.length; ++i) {
             if (i > 0)
                 result.appendChild(delimiter.cloneNode(true));
             result.appendChild(nodes[i]);
         }
         return result;
     }
 }
 
 WebInspector.ShortcutsScreen.registerShortcuts = function()
@@ skipping 324 matching lines @@
     Left: [
         WebInspector.KeyboardShortcut.makeDescriptor(WebInspector.KeyboardShortcut.Keys.Left),
         WebInspector.KeyboardShortcut.makeDescriptor("a")
     ],
 
     Right: [
         WebInspector.KeyboardShortcut.makeDescriptor(WebInspector.KeyboardShortcut.Keys.Right),
         WebInspector.KeyboardShortcut.makeDescriptor("d")
     ]
 }