mac: Flush the autorelease pool after making a browser window in browser tests.

chrome/browser/profiles/profile_browsertest.cc

Index: chrome/browser/profiles/profile_browsertest.cc
diff --git a/chrome/browser/profiles/profile_browsertest.cc b/chrome/browser/profiles/profile_browsertest.cc
index 8acaefcacb4cf1248ebe28d4570acd229a6c34f5..362107a95029265dd4becfde7682e071b05694a2 100644
--- a/chrome/browser/profiles/profile_browsertest.cc
+++ b/chrome/browser/profiles/profile_browsertest.cc
@@ -537,8 +537,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        URLFetcherUsingMainContextDuringIncognitoTeardown) {
   Browser* incognito_browser =
-      ui_test_utils::OpenURLOffTheRecord(browser()->profile(),
-                                         GURL("about:blank"));
+      OpenURLOffTheRecord(browser()->profile(), GURL("about:blank"));
   RunURLFetcherActiveDuringIncognitoTeardownTest(
       incognito_browser, incognito_browser->profile()->GetRequestContext());
 }
@@ -546,8 +545,8 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        URLFetcherUsingExtensionContextDuringIncognitoTeardown) {
   Browser* incognito_browser =
-      ui_test_utils::OpenURLOffTheRecord(browser()->profile(),
-                                         GURL("about:blank"));
+      OpenURLOffTheRecord(browser()->profile(), GURL("about:blank"));
+
   RunURLFetcherActiveDuringIncognitoTeardownTest(
       incognito_browser,
       incognito_browser->profile()->GetRequestContextForExtensions());