sync: Add DeviceInfo protobuf and supporting code

chrome/chrome_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 1823 matching lines @@
         'browser/sync/glue/chrome_sync_notification_bridge.cc',
         'browser/sync/glue/chrome_sync_notification_bridge.h',
         'browser/sync/glue/data_type_controller.cc',
         'browser/sync/glue/data_type_controller.h',
         'browser/sync/glue/data_type_error_handler.h',
         'browser/sync/glue/data_type_manager.cc',
         'browser/sync/glue/data_type_manager.h',
         'browser/sync/glue/data_type_manager_impl.cc',
         'browser/sync/glue/data_type_manager_impl.h',
         'browser/sync/glue/data_type_manager_observer.h',
+        'browser/sync/glue/device_info.cc',
+        'browser/sync/glue/device_info.h',
         'browser/sync/glue/extension_data_type_controller.cc',
         'browser/sync/glue/extension_data_type_controller.h',
         'browser/sync/glue/extension_setting_data_type_controller.cc',
         'browser/sync/glue/extension_setting_data_type_controller.h',
         'browser/sync/glue/frontend_data_type_controller.cc',
         'browser/sync/glue/frontend_data_type_controller.h',
         'browser/sync/glue/generic_change_processor.cc',
         'browser/sync/glue/generic_change_processor.h',
         'browser/sync/glue/history_model_worker.cc',
         'browser/sync/glue/history_model_worker.h',
@@ skipping 976 matching lines @@
           'variables': {
             'jni_gen_dir': 'chrome',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
      },
     ],
   ],
 }