Extensions: Split extensions utility IPC messages into its own file.

chrome/chrome_common.gypi

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'chrome_common_sources': [
       '../apps/app_shim/app_shim_launch.h',
       '../apps/app_shim/app_shim_messages.h',
       'common/all_messages.h',
       'common/attrition_experiments.h',
       'common/auto_start_linux.cc',
       'common/auto_start_linux.h',
       'common/autocomplete_match_type.cc',
       'common/autocomplete_match_type.h',
       'common/badge_util.cc',
       'common/badge_util.h',
       'common/child_process_logging.h',
       'common/child_process_logging_win.cc',
       'common/chrome_content_client.cc',
       'common/chrome_content_client.h',
       'common/chrome_content_client_constants.cc',
       'common/chrome_content_client_ios.mm',
       'common/chrome_result_codes.h',
       'common/chrome_utility_messages.h',
+      'common/chrome_utility_printing_messages.h',
       'common/chrome_version_info.cc',
       'common/chrome_version_info_android.cc',
       'common/chrome_version_info_chromeos.cc',
       'common/chrome_version_info_posix.cc',
       'common/chrome_version_info_mac.mm',
       'common/chrome_version_info_win.cc',
       'common/chrome_version_info.h',
       'common/cloud_print/cloud_print_class_mac.h',
       'common/cloud_print/cloud_print_class_mac.mm',
       'common/cloud_print/cloud_print_cdd_conversion.cc',
@@ skipping 34 matching lines @@
       'common/extensions/api/plugins/plugins_handler.h',
       'common/extensions/api/storage/storage_schema_manifest_handler.cc',
       'common/extensions/api/storage/storage_schema_manifest_handler.h',
       'common/extensions/api/supervised_user_private/supervised_user_handler.cc',
       'common/extensions/api/supervised_user_private/supervised_user_handler.h',
       'common/extensions/chrome_extension_messages.h',
       'common/extensions/chrome_extensions_client.cc',
       'common/extensions/chrome_extensions_client.h',
       'common/extensions/chrome_manifest_handlers.cc',
       'common/extensions/chrome_manifest_handlers.h',
+      'common/extensions/chrome_utility_extensions_messages.h',
       'common/extensions/command.cc',
       'common/extensions/command.h',
       'common/extensions/extension_constants.cc',
       'common/extensions/extension_constants.h',
       'common/extensions/extension_file_util.cc',
       'common/extensions/extension_file_util.h',
       'common/extensions/extension_process_policy.cc',
       'common/extensions/extension_process_policy.h',
       'common/extensions/features/chrome_channel_feature_filter.cc',
       'common/extensions/features/chrome_channel_feature_filter.h',
@@ skipping 592 matching lines @@
         'common/metrics/proto/chrome_experiments.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }