[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/timeline/CountersGraph.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 507 matching lines @@
     }
 }
 
 
 /**
  * @constructor
  * @extends {WebInspector.Object}
  */
 WebInspector.SwatchCheckbox = function(title, color)
 {
-    this.element = document.createElement("div");
+    this.element = createElement("div");
     this._swatch = this.element.createChild("div", "swatch");
     this.element.createChild("span", "title").textContent = title;
     this._color = color;
     this.checked = true;
 
     this.element.addEventListener("click", this._toggleCheckbox.bind(this), true);
 }
 
 WebInspector.SwatchCheckbox.Events = {
     Changed: "Changed"
@@ skipping 15 matching lines @@
     },
 
     _toggleCheckbox: function(event)
     {
         this.checked = !this.checked;
         this.dispatchEventToListeners(WebInspector.SwatchCheckbox.Events.Changed);
     },
 
     __proto__: WebInspector.Object.prototype
 }