Policy: generate boilerplate policy type and constant code.

chrome/common_constants.gypi

 # Copyright (c) 2009 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.
 
 {
   'target_defaults': {
     'variables': {
       'common_constants_target': 0,
     },
     'target_conditions': [
       ['common_constants_target==1', {
         'sources': [
           'common/chrome_constants.cc',
           'common/chrome_constants.h',
           'common/chrome_paths.cc',
           'common/chrome_paths.h',
           'common/chrome_paths_internal.h',
           'common/chrome_paths_linux.cc',
           'common/chrome_paths_mac.mm',
           'common/chrome_paths_win.cc',
           'common/chrome_switches.cc',
           'common/chrome_switches.h',
           'common/env_vars.cc',
           'common/env_vars.h',
           'common/json_value_serializer.cc',
           'common/json_value_serializer.h',
           'common/net/gaia/gaia_constants.cc',
           'common/net/gaia/gaia_constants.h',
-          'common/policy_constants.cc',
-          'common/policy_constants.h',
+          '<(policy_out_dir)/chrome/common/policy_constants.cc',
+          '<(policy_out_dir)/chrome/common/policy_constants.h',
           'common/pref_names.cc',
           'common/pref_names.h',
         ],
         'actions': [
           {
             'action_name': 'Make chrome_version.cc',
             'variables': {
               'make_version_cc_path': 'tools/build/make_version_cc.py',
             },
             'inputs': [
@@ skipping 18 matching lines @@
   'targets': [
     {
       'target_name': 'common_constants',
       'type': '<(library)',
       'variables': {
         'common_constants_target': 1,
       },
       'dependencies': [
         '../base/base.gyp:base',
       ],
+      'include_dirs': [
+        '<(policy_out_dir)',
+      ],
       'conditions': [
         ['OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
           'dependencies': ['../build/linux/system.gyp:gtk'],
         }],
       ],
     },
   ],
   'conditions': [
     ['OS=="win"', {
       'targets': [
@@ skipping 12 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }