DevTools: [Documentation] Disable external XHR requests in documentation tests

Source/devtools/front_end/documentation/DocumentationURLProvider.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  */
 WebInspector.DocumentationURLProvider = function()
 {
     this._gapFromIndex = 0;
@@ skipping 122 matching lines @@
     new WebInspector.DocumentationURLProvider.DocumentationSource(Number, "javascript/Number/", "Number"),
     new WebInspector.DocumentationURLProvider.DocumentationSource(Number.prototype, "javascript/Number/", "Number.prototype"),
     new WebInspector.DocumentationURLProvider.DocumentationSource(Error.prototype, "javascript/Error/", "Error.prototype"),
     new WebInspector.DocumentationURLProvider.DocumentationSource(RegExp.prototype, "javascript/regular_expression/", "RegExp.prototype"),
     new WebInspector.DocumentationURLProvider.DocumentationSource(Function.prototype, "javascript/Function/", "Function.prototype")
 ];
 
 /**
  * @const
  */
-WebInspector.DocumentationURLProvider._articleUrlFormat = "http://docs.webplatform.org/w/api.php?action=query&titles=%s%s&prop=revisions&rvprop=timestamp|content&format=json";
+WebInspector.DocumentationURLProvider.urlPrefix = "http://docs.webplatform.org";
 
 /**
  * @const
  */
-WebInspector.DocumentationURLProvider._articleListUrlFormat = "http://docs.webplatform.org/w/api.php?action=query&generator=allpages&gaplimit=500&gapfrom=%s&format=json";
+WebInspector.DocumentationURLProvider._articleUrlFormat = WebInspector.DocumentationURLProvider.urlPrefix + "/w/api.php?action=query&titles=%s%s&prop=revisions&rvprop=timestamp|content&format=json";
 
 /**
  * @const
+ */
+WebInspector.DocumentationURLProvider._articleListUrlFormat = WebInspector.DocumentationURLProvider.urlPrefix + "/w/api.php?action=query&generator=allpages&gaplimit=500&gapfrom=%s&format=json";
+
+/**
+ * @const
  */
 WebInspector.DocumentationURLProvider._gapFromList = [
     "dom/Node/",
     "javascript/"
 ];
 
 WebInspector.DocumentationURLProvider.prototype = {
     /**
      * @param {string} searchTerm
      * @return {!Array.<!WebInspector.DocumentationURLProvider.ItemDescriptor>}
@@ skipping 90 matching lines @@
      * FIXME: object parameter is not annotated properly due to crbug.com/407097
      * @param {*} object
      * @param {string} propertyName
      * @return {boolean}
      */
     _inheritedFromFunction: function(object, propertyName)
     {
         return (object instanceof Function && object.hasOwnProperty(propertyName) && Function.hasOwnProperty(propertyName));
     }
 }