Enable building with configuration_policy==1 on ios.

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',
@@ skipping 114 matching lines @@
         'core/common/schema.cc',
         'core/common/schema.h',
         'core/common/schema_internal.h',
         'core/common/schema_map.cc',
         'core/common/schema_map.h',
         'core/common/schema_registry.cc',
         'core/common/schema_registry.h',
         'policy_export.h',
       ],
       'conditions': [
-        ['OS=="android"', {
+        ['OS=="android" or OS=="ios"', {
           'sources': [
             'core/common/cloud/component_cloud_policy_service_stub.cc',
           ],
           'sources!': [
             'core/common/async_policy_loader.cc',
             'core/common/async_policy_loader.h',
             'core/common/async_policy_provider.cc',
             'core/common/async_policy_provider.h',
             'core/common/cloud/component_cloud_policy_service.cc',
             'core/common/cloud/component_cloud_policy_store.cc',
@@ skipping 36 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',
       ],
     }],
   ],
 }