MD Settings: add tests for <controlled-button>

ui/webui/resources/cr_elements/policy/compiled_resources2.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_policy_indicator_behavior',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'cr_policy_pref_behavior',
       'dependencies': [
+        '<(EXTERNS_GYP):settings_private',
         'cr_policy_indicator_behavior',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'cr_policy_pref_indicator',
       'dependencies': [
         '<(EXTERNS_GYP):settings_private',
         'cr_policy_indicator_behavior',
         'cr_policy_pref_behavior',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'cr_policy_network_behavior',
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'cr_policy_network_indicator',
       'dependencies': [
         '../network/compiled_resources2.gyp:cr_onc_types',
         'cr_policy_indicator_behavior',
         'cr_policy_network_behavior',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }