Disable flaky incognito-related tests on Mac ASAN.

chrome/browser/ui/webui/options/content_settings_exception_area_browsertest.cc

 // Copyright 2015 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 "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/webui/options/options_ui_browsertest.h"
 
 typedef options::OptionsUIBrowserTest ContentSettingsExceptionsAreaBrowserTest;
 
 // Test that an incognito window can be opened while the exceptions page is
 // open. If this test fails it could indicate that a new content setting has
 // been added but is not being dealt with correctly by the content settings
 // handling WebUI code.
+#if defined(OS_MACOSX) && defined(ADDRESS_SANITIZER)
+// Flaky on ASAN on Mac. See https://crbug.com/674497.
+#define MAYBE_OpenIncognitoWindow DISABLED_OpenIncognitoWindow
+#else
+#define MAYBE_OpenIncognitoWindow OpenIncognitoWindow
+#endif
 IN_PROC_BROWSER_TEST_F(ContentSettingsExceptionsAreaBrowserTest,
-                       OpenIncognitoWindow) {
+                       MAYBE_OpenIncognitoWindow) {
   NavigateToSettingsSubpage("contentExceptions");
   chrome::NewIncognitoWindow(browser());
 }