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

chrome/browser/extensions/api/web_navigation/web_navigation_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 <list>
 #include <set>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 572 matching lines @@
 
   // Wait for the extension to set itself up and return control to us.
   ASSERT_TRUE(RunExtensionTestIncognito("webnavigation/targetBlank"))
       << message_;
 
   ResultCatcher catcher;
 
   GURL url = embedded_test_server()->GetURL(
       "/extensions/api_test/webnavigation/targetBlank/a.html");
 
-  Browser* otr_browser = ui_test_utils::OpenURLOffTheRecord(
-      browser()->profile(), url);
+  Browser* otr_browser = OpenURLOffTheRecord(browser()->profile(), url);
   WebContents* tab = otr_browser->tab_strip_model()->GetActiveWebContents();
 
   // There's a link with target=_blank on a.html. Click on it to open it in a
   // new tab.
   blink::WebMouseEvent mouse_event;
   mouse_event.type = blink::WebInputEvent::MouseDown;
   mouse_event.button = blink::WebMouseEvent::ButtonLeft;
   mouse_event.x = 7;
   mouse_event.y = 7;
   mouse_event.clickCount = 1;
@@ skipping 154 matching lines @@
           "extensions/api_test/webnavigation/crash/b.html",
       embedded_test_server()->port()));
   ui_test_utils::NavigateToURL(browser(), url);
 
   ASSERT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
 #endif
 
 }  // namespace extensions