Add cr_policy_indicator for settings controls

ui/webui/resources/cr_elements/v1_0/policy/compiled_resources.gyp

 # Copyright 2014 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.
 {
   'targets': [
     {
-      'target_name': 'cr_checkbox',
+      'target_name': 'cr_policy_indicator',
+      'variables': {
+        'externs': [
+          '../../../../../../third_party/closure_compiler/externs/settings_private.js'
+        ],
+      },
       'includes': ['../../../../../../third_party/closure_compiler/compile_js.gypi'],
-    }
+    },
   ],
 }