Temporary disables 2 tests in service_worker_browsertest.cc.

content/test/data/service_worker/fetch_event_reload.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.
 
 this.onfetch = function(event) {
-    var headers = new HeaderMap;
+    var headers = new Headers;
     headers.set('Content-Type', 'text/html; charset=UTF-8');
     var blob = new Blob(['<title>reload='+ event.isReload + '</title>']);
     var response = new Response(blob);
     event.respondWith(response);
 };