sync: Store hard coded constants into its header file.

chrome/browser/sync/tools/sync_tools.gyp

 # Copyright (c) 2010 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.
 
 {
   'defines': [
     'FEATURE_ENABLE_SSL',
   ],
   'targets': [
     {
       'target_name': 'sync_listen_notifications',
       'type': 'executable',
       'sources': [
+        'sync_constants.cc',
+        'sync_constants.h',
         'sync_listen_notifications.cc',
         # We are directly including the sync_constants.cc and h files to avoid
         # pulling in browser.lib.
         # TODO(akalin): Fix this.
         '<(DEPTH)/chrome/browser/sync/sync_constants.cc',
         '<(DEPTH)/chrome/browser/sync/sync_constants.h',
       ],
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/chrome/chrome.gyp:notifier',
         '<(DEPTH)/third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
         '<(DEPTH)/third_party/libjingle/libjingle.gyp:libjingle',
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: