Add lots of GN targets

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.
 
 {
+  # GN version: //components/policy/core/common
   'dependencies': [
     '../base/base.gyp:base',
   ],
   'defines': [
     'POLICY_COMPONENT_IMPLEMENTATION',
   ],
   'include_dirs': [
     '..',
   ],
   'conditions': [
@@ skipping 190 matching lines @@
         'core/common/policy_pref_names.cc',
         'core/common/policy_pref_names.h',
         'core/common/policy_service.cc',
         'core/common/policy_service.h',
         'core/common/policy_service_stub.cc',
         'core/common/policy_service_stub.h',
       ],
     }],
   ],
 }