GTTF: convert some tests in chrome to use EmbeddedTestServer patch nr 1

chrome/test/data/extensions/api_test/executescript/run_at/test.js

 // Copyright (c) 2012 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.
 
 var relativePath =
-    '/files/extensions/api_test/executescript/run_at/test.html';
+    '/extensions/api_test/executescript/run_at/test.html';
 var testUrl = 'http://b.com:PORT' + relativePath;
 
 chrome.test.getConfig(function(config) {
   testUrl = testUrl.replace(/PORT/, config.testServer.port);
   chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
     if (changeInfo.status != 'complete')
       return;
     chrome.tabs.onUpdated.removeListener(arguments.callee);
     chrome.test.runTests([
       function executeAtStartShouldSucceed() {
         var scriptDetails = {};
         scriptDetails.code = "document.title = 'Injected';";
         scriptDetails.runAt = "document_start";
         chrome.tabs.executeScript(tabId, scriptDetails, function() {
           chrome.tabs.get(tabId, chrome.test.callbackPass(function(tab) {
             chrome.test.assertEq('Injected', tab.title);
           }));
         });
       },
     ]);
   });
   chrome.tabs.create({ url: testUrl });
 });