Avoid DidStopLoading messages from the old renderer process during a transfer.

chrome/browser/extensions/app_process_apitest.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/process_map.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 653 matching lines @@
 // that's not in the app's extent but that redirects to it, we still end up with
 // an app process. See http://crbug.com/99349 for more details.
 IN_PROC_BROWSER_TEST_F(AppApiTest, OpenAppFromExtension) {
   host_resolver()->AddRule("*", "127.0.0.1");
   ASSERT_TRUE(StartTestServer());
 
   LoadExtension(test_data_dir_.AppendASCII("app_process"));
   const Extension* launcher =
       LoadExtension(test_data_dir_.AppendASCII("app_launcher"));
 
-  // There should be three navigations by the time the app page is loaded.
+  // There should be two navigations by the time the app page is loaded.
   // 1. The extension launcher page.
-  // 2. The URL that the extension launches, which redirects.
-  // 3. The app's URL.
+  // 2. The app's URL (which includes a server redirect).
+  // Note that the server redirect does not generate a navigation event.
   content::TestNavigationObserver test_navigation_observer(
       content::NotificationService::AllSources(),
-      3);
+      2);
 
   // Load the launcher extension, which should launch the app.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(),
       launcher->GetResourceURL("main.html"),
       CURRENT_TAB,
       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 
   // Wait for app tab to be created and loaded.
   test_navigation_observer.WaitForObservation(
@@ skipping 85 matching lines @@
           &browser()->tab_strip_model()->GetActiveWebContents()->
               GetController()));
   chrome::Reload(browser(), CURRENT_TAB);
   observer.Wait();
   ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
       contents,
       "window.domAutomationController.send(chrome.app.isInstalled)",
       &is_installed));
   ASSERT_TRUE(is_installed);
 }