Disable flaky UnloadTest.CrossSiteInfiniteBeforeUnloadSync on Mac.

chrome/browser/unload_browsertest.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.
 
 #if defined(OS_POSIX)
 #include <signal.h>
 #endif
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 220 matching lines @@
     return;
 
   NavigateToDataURL(INFINITE_BEFORE_UNLOAD_HTML, "infinitebeforeunload");
   // Must navigate to a non-data URL to trigger cross-site codepath.
   NavigateToNolistenersFileTwiceAsync();
 }
 
 // Navigate to a page with an infinite beforeunload handler.
 // Then two two sync crosssite requests to ensure
 // we correctly nav to each one.
-// Flaky on Win and Linux; http://crbug.com/462671.
-#if defined(OS_WIN) || defined(OS_LINUX)
-#define MAYBE_CrossSiteInfiniteBeforeUnloadSync \
-    DISABLED_CrossSiteInfiniteBeforeUnloadSync
-#else
-#define MAYBE_CrossSiteInfiniteBeforeUnloadSync \
-    CrossSiteInfiniteBeforeUnloadSync
-#endif
-IN_PROC_BROWSER_TEST_F(UnloadTest, MAYBE_CrossSiteInfiniteBeforeUnloadSync) {
+// Flaky on Win, Linux, and Mac; http://crbug.com/462671.
+IN_PROC_BROWSER_TEST_F(UnloadTest, DISABLED_CrossSiteInfiniteBeforeUnloadSync) {
   // Tests makes no sense in single-process mode since the renderer is hung.
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSingleProcess))
     return;
 
   NavigateToDataURL(INFINITE_BEFORE_UNLOAD_HTML, "infinitebeforeunload");
   // Must navigate to a non-data URL to trigger cross-site codepath.
   NavigateToNolistenersFileTwice();
 }
 
@@ skipping 386 matching lines @@
   content::WindowedNotificationObserver window_observer(
         chrome::NOTIFICATION_BROWSER_CLOSED,
         content::NotificationService::AllSources());
   chrome::CloseWindow(browser());
   CrashTab(beforeunload_contents);
   window_observer.Wait();
 }
 
 // TODO(ojan): Add tests for unload/beforeunload that have multiple tabs
 // and multiple windows.