Fix webview.executeScript API

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 583 matching lines @@
       function(results) {
         embedder.test.assertEq(1, results.length);
         embedder.test.assertEq('red', results[0]);
         embedder.test.succeed();
       });
   });
   webview.setAttribute('src', 'data:text/html,trigger navigation');
   document.body.appendChild(webview);
 }
 
+// This test verifies that the call of executeScript will fail and return null
+// if the webview has been navigated to another source.
+function testExecuteScriptIsAbortedWhenWebViewSourceIsChanged() {
+  var webview = document.createElement('webview');
+  var step = 1;
+  var navigationOccur = false;
+  var newSrc = 'data:text/html,trigger navigation';
+  webview.addEventListener('loadstart', function() {
+    if (step == 1) {
+      webview.setAttribute('src', newSrc);
+      navigationOccur = true;
+    }
+    ++step;
+  });
+  webview.addEventListener('loadstop', function() {
+    webview.executeScript(
+      {code:'document.body.style.backgroundColor = "red";'},
+      function(results) {
+        if (navigationOccur) {
+          // Expect a null results because the executeScript failed;
+          // return "red", otherwise.
+          embedder.test.assertEq(null, results);
+          embedder.test.succeed();
+        }
+        navigationOccur = false;
+      }
+    );
+  });
+  webview.setAttribute('src', "about:blank");
+  document.body.appendChild(webview);
+}
+
 // This test calls terminate() on guest after it has already been
 // terminated. This makes sure we ignore the call gracefully.
 function testTerminateAfterExit() {
   var webview = document.createElement('webview');
   webview.setAttribute('partition', arguments.callee.name);
   var loadstopSucceedsTest = false;
   webview.addEventListener('loadstop', function(evt) {
     embedder.test.assertEq('loadstop', evt.type);
     if (loadstopSucceedsTest) {
       embedder.test.succeed();
@@ skipping 859 matching lines @@
   'testInvalidChromeExtensionURL': testInvalidChromeExtensionURL,
   'testWebRequestAPIExistence': testWebRequestAPIExistence,
   'testEventName': testEventName,
   'testOnEventProperties': testOnEventProperties,
   'testLoadProgressEvent': testLoadProgressEvent,
   'testDestroyOnEventListener': testDestroyOnEventListener,
   'testCannotMutateEventName': testCannotMutateEventName,
   'testPartitionRaisesException': testPartitionRaisesException,
   'testExecuteScriptFail': testExecuteScriptFail,
   'testExecuteScript': testExecuteScript,
+  'testExecuteScriptIsAbortedWhenWebViewSourceIsChanged':
+      testExecuteScriptIsAbortedWhenWebViewSourceIsChanged,
   'testTerminateAfterExit': testTerminateAfterExit,
   'testAssignSrcAfterCrash': testAssignSrcAfterCrash,
   'testNavOnConsecutiveSrcAttributeChanges':
       testNavOnConsecutiveSrcAttributeChanges,
   'testNavOnSrcAttributeChange': testNavOnSrcAttributeChange,
   'testReassignSrcAttribute': testReassignSrcAttribute,
   'testRemoveSrcAttribute': testRemoveSrcAttribute,
   'testBrowserPluginNotAllowed': testBrowserPluginNotAllowed,
   'testPluginLoadPermission': testPluginLoadPermission,
   'testNewWindow': testNewWindow,
@@ skipping 25 matching lines @@
   'testFindAPI': testFindAPI,
   'testFindAPI_findupdate': testFindAPI
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.setUp_(config);
     chrome.test.sendMessage("Launched");
   });
 };