Add regex support in policy schema

components/policy/policy_common.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
   ],
   'defines': [
     'POLICY_COMPONENT_IMPLEMENTATION',
   ],
   'include_dirs': [
     '..',
   ],
   'conditions': [
     ['configuration_policy==1', {
       'dependencies': [
         '../base/base.gyp:base_prefs',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../google_apis/google_apis.gyp:google_apis',
         '../net/net.gyp:net',
+        '../third_party/re2/re2.gyp:re2',
         '../url/url.gyp:url_lib',
         'cloud_policy_proto',
         'json_schema',
         'policy',
       ],
       'sources': [
         'core/common/cloud/cloud_external_data_manager.cc',
         'core/common/cloud/cloud_external_data_manager.h',
         'core/common/cloud/cloud_policy_client.cc',
         'core/common/cloud/cloud_policy_client.h',
@@ skipping 171 matching lines @@
         'core/common/policy_namespace.cc',
         'core/common/policy_namespace.h',
         'core/common/policy_service.cc',
         'core/common/policy_service.h',
         'core/common/policy_service_stub.cc',
         'core/common/policy_service_stub.h',
       ],
     }],
   ],
 }