Fix bug with invalid chrome.sessions.onChanged listener.

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

Index: chrome/browser/extensions/api/sessions/sessions_apitest.cc
diff --git a/chrome/browser/extensions/api/sessions/sessions_apitest.cc b/chrome/browser/extensions/api/sessions/sessions_apitest.cc
index 22c4c82058028d9109f18d89fa63dfa0737ac13a..d9c1a037297d374dca2f39ed9a5bc309e7d7c1ad 100644
--- a/chrome/browser/extensions/api/sessions/sessions_apitest.cc
+++ b/chrome/browser/extensions/api/sessions/sessions_apitest.cc
@@ -387,6 +387,12 @@ IN_PROC_BROWSER_TEST_F(ExtensionSessionsTest, GetRecentlyClosedIncognito) {
   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)