Make tab capture media stream requests verify that the request came from extension API

chrome/test/data/extensions/api_test/tab_capture/experimental/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 tabCapture = chrome.tabCapture;
 
 chrome.test.runTests([
 
   function captureInvalidTab() {
     var tabMediaRequestCallback = function(stream) {
@@ skipping 16 matching lines @@
       stream.stop();
     };
 
     var tabCaptureListener = function(info) {
       chrome.test.assertEq(tabId, info.tabId);
       console.log(info.status);
       if (info.status == 'stopped') {
         chrome.test.assertEq('active', tabCaptureEvents.pop());
         chrome.test.assertEq('pending', tabCaptureEvents.pop());
         chrome.test.assertEq('requested', tabCaptureEvents.pop());
+        tabCapture.onStatusChanged.removeListener(tabCaptureListener);
         chrome.test.succeed();
         return;
       }
       tabCaptureEvents.push(info.status);
     }
 
     tabCapture.onStatusChanged.addListener(tabCaptureListener);
 
     var gotTabId = function(tab) {
       tabId = tab[0].id;
@@ skipping 13 matching lines @@
       chrome.test.assertEq(tabId, infos[0].tabId);
       chrome.test.assertEq('stopped', infos[0].status);
       chrome.test.succeed();
     }
 
     var capturedTabsAfterOpen = function(infos) {
       chrome.test.assertEq(1, infos.length);
       chrome.test.assertEq(tabId, infos[0].tabId);
       chrome.test.assertEq('active', infos[0].status);
       activeStream.stop();
+      tabCapture.getCapturedTabs(capturedTabsAfterClose);
     }
 
     var tabMediaRequestCallback = function(stream) {
       chrome.test.assertTrue(stream !== undefined);
       activeStream = stream;
       tabCapture.getCapturedTabs(capturedTabsAfterOpen);
     };
 
     var gotTabId = function(tab) {
       tabId = tab[0].id;
@@ skipping 26 matching lines @@
     var gotTabId = function(tab) {
       tabId = tab[0].id;
       console.log('using tab: ' + tabId);
       tabCapture.capture(tabId, {audio: true, video: true},
         tabMediaRequestCallback);
     };
     chrome.tabs.query({active: true}, gotTabId);
   },
 
 ]);