WORK IN PROGRESS.

chrome/browser/sync/protocol/sync_proto.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.
 
 {
   'variables': {
     'chromium_code': 1,
     'protoc_out_dir': '<(SHARED_INTERMEDIATE_DIR)/protoc_out',
   },
   'targets': [
     {
       # Protobuf compiler / generate rule for sync.proto.  This is used by
       # test code in net, which is why it's isolated into its own .gyp file.
       'target_name': 'sync_proto',
       'type': 'none',
       'sources': [
         'sync.proto',
         'encryption.proto',
         'app_specifics.proto',
         'autofill_specifics.proto',
         'bookmark_specifics.proto',
+        'extension_setting_specifics.proto',
         'extension_specifics.proto',
         'nigori_specifics.proto',
         'password_specifics.proto',
         'preference_specifics.proto',
         'search_engine_specifics.proto',
         'session_specifics.proto',
         'test.proto',
         'theme_specifics.proto',
         'typed_url_specifics.proto',
       ],
@@ skipping 30 matching lines @@
         '<(protoc_out_dir)/chrome/browser/sync/protocol/sync.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/sync.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/encryption.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/encryption.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/app_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/app_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/autofill_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/autofill_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/bookmark_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/bookmark_specifics.pb.h',
+        '<(protoc_out_dir)/chrome/browser/sync/protocol/extension_setting_specifics.pb.cc',
+        '<(protoc_out_dir)/chrome/browser/sync/protocol/extension_setting_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/extension_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/extension_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/nigori_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/nigori_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/password_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/password_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/preference_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/preference_specifics.pb.h',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/search_engine_specifics.pb.cc',
         '<(protoc_out_dir)/chrome/browser/sync/protocol/search_engine_specifics.pb.h',
@@ skipping 16 matching lines @@
         'include_dirs': [
           '<(protoc_out_dir)',
         ],
       },
       # This target exports a hard dependency because it includes generated
       # header files.
       'hard_dependency': 1,
     },
   ],
 }