Disable ProfileListDesktopBrowserTest.SignOut on ASAN on Mac.

chrome/browser/profiles/profile_list_desktop_browsertest.cc

 // Copyright (c) 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 "base/command_line.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 32 matching lines @@
     return std::unique_ptr<AvatarMenu>(
         new AvatarMenu(storage, NULL, browser()));
   }
 
  private:
   std::unique_ptr<AvatarMenu> avatar_menu_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileListDesktopBrowserTest);
 };
 
-#if defined(OS_WIN)
-// SignOut is flaky. So far only observed on Windows. crbug.com/357329.
+#if defined(OS_WIN) || (defined(OS_MACOSX) && defined(ADDRESS_SANITIZER))
+// SignOut is flaky on Windows, crbug.com/357329,
+// and Mac with ASAN, crbug.com/674497.
 #define MAYBE_SignOut DISABLED_SignOut
 #elif defined(OS_CHROMEOS)
 // This test doesn't make sense for Chrome OS since it has a different
 // multi-profiles menu in the system tray instead.
 #define MAYBE_SignOut DISABLED_SignOut
 #else
 #define MAYBE_SignOut SignOut
 #endif
 IN_PROC_BROWSER_TEST_F(ProfileListDesktopBrowserTest, MAYBE_SignOut) {
   if (!profiles::IsMultipleProfilesEnabled())
@@ skipping 73 matching lines @@
                         false, ProfileMetrics::SWITCH_PROFILE_ICON);
   EXPECT_EQ(2u, browser_list->size());
 
   // Switch to the first profile without opening a new window.
   menu->SwitchToProfile(menu->GetIndexOfItemWithProfilePath(path_profile1),
                         false, ProfileMetrics::SWITCH_PROFILE_ICON);
   EXPECT_EQ(2u, browser_list->size());
   EXPECT_EQ(path_profile1, browser_list->get(0)->profile()->GetPath());
   EXPECT_EQ(path_profile2, browser_list->get(1)->profile()->GetPath());
 }