Fixed DefaultNotificationsSetting on ChromeOS.

BUG=chromium-os:23079
TEST=policy_prefs_ui.py passes on chromeos for all policies

Review URL: http://codereview.chromium.org/8584004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111120 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/policy/policy_templates.json

@@ -1410,7 +1410,7 @@
               'caption': '''Ask every time a site wants to show desktop notifications'''
             },
           ],
-          'supported_on': ['chrome.*:10-'],
+          'supported_on': ['chrome.*:10-', 'chrome_os:0.11-'],
           'features': {'dynamic_refresh': 1},
           'example_value': 2,
           'id': 53,