Fix bug with invalid chrome.sessions.onChanged listener.

chrome/browser/extensions/api/sessions/sessions_apitest.cc

 // Copyright 2013 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 <stddef.h>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/path_service.h"
@@ skipping 369 matching lines @@
   scoped_ptr<base::ListValue> result(utils::ToList(
       utils::RunFunctionAndReturnSingleResult(
           CreateFunction<SessionsGetRecentlyClosedFunction>(true).get(),
           "[]",
           CreateIncognitoBrowser())));
   ASSERT_TRUE(result);
   base::ListValue* sessions = result.get();
   EXPECT_EQ(0u, sessions->GetSize());
 }
 
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, SessionsApisOnChanged) {
+  ASSERT_TRUE(RunExtensionSubtest("sessions/onchanged",
+                                  "onchanged.html",
+                                  kFlagEnableIncognito)) << message_;
+}
+
 // http://crbug.com/251199
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_SessionsApis) {
 #if defined(OS_WIN) && defined(USE_ASH)
   // Disable this test in Metro+Ash for now (http://crbug.com/262796).
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAshBrowserTests))
     return;
 #endif
 
   ASSERT_TRUE(RunExtensionSubtest("sessions",
                                   "sessions.html")) << message_;
 }
 
 }  // namespace
 
 }  // namespace extensions