Invalidate the previous frame when the window object is cleared.

chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js

Index: chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js
diff --git a/chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js b/chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js
index c0a3918299a9ad29802932c16b137cb904fb5f05..5d08ce0a68dd5d10f773dea4f73eff7770fbdd86 100644
--- a/chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js
+++ b/chrome/test/data/extensions/api_test/content_scripts/about_blank_iframes/test.js
@@ -2,25 +2,30 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+function checkFirstMessageEquals(expectedRequest) {
+  return function(request) {
+    if (request != expectedRequest)
+      chrome.test.fail('Unexpected request: ' + JSON.stringify(request));
+    // chrome.test.succeed() will be called by chrome.test.listenOnce().
+    // If this function is not used by chrome.test.listenOnce(), then
+    // call chrome.test.succeed() when you're done.
+  };
+}
+
+var onRequest = chrome.extension.onRequest;
 chrome.test.getConfig(function(config) {
-  chrome.extension.onRequest.addListener(
-    function(request, sender, sendResponse) {
-      if (request == 'parent')
-        chrome.test.succeed();
-      else
-        chrome.test.fail('Unexpected request: ' + JSON.stringify(request));
-    }
-  );
   chrome.test.runTests([
     function testDontInjectInAboutBlankFrame() {
-      chrome.test.log("Creating tab...");
+      chrome.test.listenOnce(onRequest, checkFirstMessageEquals('parent'));
+      chrome.test.log('Creating tab...');
       var test_url =
-          ("http://localhost:PORT/extensions/" +
-           "test_file_with_about_blank_iframe.html")
+          ('http://localhost:PORT/extensions/' +
+           'test_file_with_about_blank_iframe.html')
               .replace(/PORT/, config.testServer.port);
       chrome.tabs.create({ url: test_url });
     },
     function testDontInjectInAboutSrcdocFrame() {
+      chrome.test.listenOnce(onRequest, checkFirstMessageEquals('parent'));
       chrome.test.log('Creating tab...');
       var test_url =
           ('http://localhost:PORT/extensions/' +
@@ -29,12 +34,35 @@ chrome.test.getConfig(function(config) {
       chrome.tabs.create({ url: test_url });
     },
     function testDontInjectInNestedAboutFrames() {
+      chrome.test.listenOnce(onRequest, checkFirstMessageEquals('parent'));
       chrome.test.log('Creating tab...');
       var test_url =
           ('http://localhost:PORT/extensions/' +
            'test_file_with_about_blank_in_srcdoc.html')
               .replace(/PORT/, config.testServer.port);
       chrome.tabs.create({ url: test_url });
+    },
+    function testDocumentStartRunsInSameWorldAsDocumentEndOfJavaScriptUrl() {
+      var hasReceivedFirstMessage = false;
+      onRequest.addListener(function listener(request) {
+        if (!hasReceivedFirstMessage) {
+          hasReceivedFirstMessage = true;
+          // Step one: Empty document where the JavaScript code was executed.
+          checkFirstMessageEquals('jsresult/')(request);
+        } else {
+          onRequest.removeListener(listener);
+          // Step 2: The empty document was replaced with the result of
+          // the evaluated JavaScript code.
+          checkFirstMessageEquals('jsresult/something')(request);
+          chrome.test.succeed();
+        }
+      });
+      chrome.test.log('Creating tab...');
+      var test_url =
+          ('http://localhost:PORT/extensions/' +
+           'test_file_with_javascript_url_iframe.html')
+              .replace(/PORT/, config.testServer.port);
+      chrome.tabs.create({ url: test_url });
     }
   ]);
 });