Cleanup webview app_shell_browsertests and add webview media permission tests in app_shell_browsert…

extensions/test/data/web_view/media_access/deny/embedder.js

 // Copyright 2013 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 embedder = {};
 embedder.tests = {};
-embedder.baseGuestURL = '';
-embedder.guestURL = '';
 
 embedder.passTest = function() {
-  chrome.test.sendMessage('PASSED');
+  chrome.test.sendMessage('TEST_PASSED');
 };
 
 embedder.failTest = function(opt_msg) {
   if (opt_msg) {
-    window.console.log(opt_msg);
+    window.console.warn(opt_msg);
   }
-  chrome.test.sendMessage('FAILED');
+  chrome.test.sendMessage('TEST_FAILED');
 };
 
 embedder.assertTrue = function(condition, msg) {
   if (!condition) {
     window.console.log('embedder assertion failure: ' + msg);
     embedder.failTest();
   }
 };
 
 /** @private */
@@ skipping 157 matching lines @@
 
 embedder.testNamesToTestMap = {
   'testDeny': embedder.tests.testDeny,
   'testDenyThenAllowThrows': embedder.tests.testDenyThenAllowThrows,
   'testDenyWithPreventDefault': embedder.tests.testDenyWithPreventDefault,
   'testNoListenersImplyDeny': embedder.tests.testNoListenersImplyDeny,
   'testNoPreventDefaultImpliesDeny':
       embedder.tests.testNoPreventDefaultImpliesDeny
 };
 
-window['startDenyTest'] = function(testName) {
+function runTest(testName) {
   var testFunction = embedder.testNamesToTestMap[testName];
   if (!testFunction) {
     embedder.failTest('No such test: ' + testName);
     return;
   }
   testFunction();
 };
 
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.baseGuestURL = 'http://localhost:' + config.testServer.port;
-    embedder.guestURL = embedder.baseGuestURL +
-        '/extensions/platform_apps/web_view/media_access' +
-        '/media_access_guest.html';
+    embedder.guestURL = embedder.baseGuestURL + '/media_access_guest.html';
     chrome.test.log('Guest url is: ' + embedder.guestURL);
-    chrome.test.sendMessage('loaded');
+    chrome.test.sendMessage('LAUNCHED');
   });
 };