<webview>: Cleanup WebRequest event listeners when embedder destroyed

chrome/test/data/extensions/platform_apps/web_view/shim/main.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 util = {};
 var embedder = {};
 embedder.baseGuestURL = '';
 embedder.emptyGuestURL = '';
 embedder.windowOpenGuestURL = '';
 embedder.noReferrerGuestURL = '';
@@ skipping 740 matching lines @@
   webview.addEventListener('contentload', function(e) {
     embedder.test.succeed();
   });
   webview.setAttribute('src', 'data:text/html,trigger navigation');
   document.body.appendChild(webview);
 }
 
 // This test verifies that the WebRequest API onBeforeRequest event fires on
 // webview.
 function testWebRequestAPI() {
-  var webview = document.createElement('webview');
-  webview.setAttribute('src', 'data:text/html,trigger navigation');
-  var firstLoad = function() {
-    webview.removeEventListener('loadstop', firstLoad);
-    webview.onBeforeRequest.addListener(function(e) {
-      embedder.test.succeed();
-    }, { urls: ['<all_urls>']}, ['blocking']) ;
-    webview.src = embedder.windowOpenGuestURL;
-  };
-  webview.addEventListener('loadstop', firstLoad);
+  var webview = new WebView();
+  webview.request.onBeforeRequest.addListener(function(e) {
+    embedder.test.succeed();
+  }, { urls: ['<all_urls>']}) ;
+  webview.src = embedder.windowOpenGuestURL;
   document.body.appendChild(webview);
 }
 
 // This test verifies that the WebRequest API onBeforeRequest event fires on
 // clients*.google.com URLs.
 function testWebRequestAPIGoogleProperty() {
-  var webview = document.createElement('webview');
-  webview.setAttribute('src', 'data:text/html,trigger navigation');
-  var firstLoad = function() {
-    webview.removeEventListener('loadstop', firstLoad);
-    webview.onBeforeRequest.addListener(function(e) {
-      embedder.test.succeed();
-      return {cancel: true};
-    }, { urls: ['<all_urls>']}, ['blocking']) ;
-    webview.src = 'http://clients6.google.com';
-  };
-  webview.addEventListener('loadstop', firstLoad);
+  var webview = new WebView();
+  webview.request.onBeforeRequest.addListener(function(e) {
+    embedder.test.succeed();
+    return {cancel: true};
+  }, { urls: ['<all_urls>']}, ['blocking']) ;
+  webview.src = 'http://clients6.google.com';
   document.body.appendChild(webview);
 }
 
+// This test verifies that the WebRequest event listener for onBeforeRequest
+// survives reparenting of the <webview>.
+function testWebRequestListenerSurvivesReparenting() {
+  var webview = new WebView();
+  var count = 0;
+  webview.request.onBeforeRequest.addListener(function(e) {
+    if (++count == 2) {
+      embedder.test.succeed();
+    }
+  }, { urls: ['<all_urls>']});
+  var onLoadStop =  function(e) {
+    webview.removeEventListener('loadstop', onLoadStop);
+    webview.parentNode.removeChild(webview);
+    var container = document.getElementById('object-container');
+    if (!container) {
+      embedder.test.fail('Container for object not found.');
+      return;
+    }
+    container.appendChild(webview);
+  };
+  webview.addEventListener('loadstop', onLoadStop);
+  webview.src = embedder.emptyGuestURL;
+  document.body.appendChild(webview);
+}
+
 // This test verifies that getProcessId is defined and returns a non-zero
 // value corresponding to the processId of the guest process.
 function testGetProcessId() {
   var webview = document.createElement('webview');
   webview.setAttribute('src', 'data:text/html,trigger navigation');
   var firstLoad = function() {
     webview.removeEventListener('loadstop', firstLoad);
     embedder.test.assertTrue(webview.getProcessId() > 0);
     embedder.test.succeed();
   };
@@ skipping 205 matching lines @@
   'testReassignSrcAttribute': testReassignSrcAttribute,
   'testRemoveSrcAttribute': testRemoveSrcAttribute,
   'testBrowserPluginNotAllowed': testBrowserPluginNotAllowed,
   'testNewWindow': testNewWindow,
   'testNewWindowTwoListeners': testNewWindowTwoListeners,
   'testNewWindowNoPreventDefault': testNewWindowNoPreventDefault,
   'testNewWindowNoReferrerLink': testNewWindowNoReferrerLink,
   'testContentLoadEvent': testContentLoadEvent,
   'testWebRequestAPI': testWebRequestAPI,
   'testWebRequestAPIGoogleProperty': testWebRequestAPIGoogleProperty,
+  'testWebRequestListenerSurvivesReparenting':
+      testWebRequestListenerSurvivesReparenting,
   'testGetProcessId': testGetProcessId,
   'testLoadStartLoadRedirect': testLoadStartLoadRedirect,
   'testLoadAbortEmptyResponse': testLoadAbortEmptyResponse,
   'testLoadAbortIllegalChromeURL': testLoadAbortIllegalChromeURL,
   'testLoadAbortIllegalFileURL': testLoadAbortIllegalFileURL,
   'testNavigationToExternalProtocol': testNavigationToExternalProtocol,
   'testReload': testReload,
   'testRemoveWebviewOnExit': testRemoveWebviewOnExit,
   'testRemoveWebviewAfterNavigation': testRemoveWebviewAfterNavigation,
   'testResizeWebviewResizesContent': testResizeWebviewResizesContent
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.setUp_(config);
     chrome.test.sendMessage("Launched");
   });
 };