Enable sync for the settings from the Extension Settings API.

chrome/browser/sync/protocol/proto_value_conversions.h

 // Copyright (c) 2011 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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #ifndef CHROME_BROWSER_SYNC_PROTOCOL_PROTO_VALUE_CONVERSIONS_H_
 #define CHROME_BROWSER_SYNC_PROTOCOL_PROTO_VALUE_CONVERSIONS_H_
 #pragma once
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace sync_pb {
 class AppSpecifics;
 class AutofillProfileSpecifics;
 class AutofillSpecifics;
 class BookmarkSpecifics;
 class EncryptedData;
 class EntitySpecifics;
+class ExtensionSettingSpecifics;
 class ExtensionSpecifics;
 class NigoriSpecifics;
 class PasswordSpecifics;
 class PasswordSpecificsData;
 class PreferenceSpecifics;
 class SearchEngineSpecifics;
 class SessionHeader;
 class SessionSpecifics;
 class SessionTab;
 class SessionWindow;
@@ skipping 46 matching lines @@
 
 base::DictionaryValue* AutofillSpecificsToValue(
     const sync_pb::AutofillSpecifics& autofill_specifics);
 
 base::DictionaryValue* AutofillProfileSpecificsToValue(
     const sync_pb::AutofillProfileSpecifics& autofill_profile_specifics);
 
 base::DictionaryValue* BookmarkSpecificsToValue(
     const sync_pb::BookmarkSpecifics& bookmark_specifics);
 
+base::DictionaryValue* ExtensionSettingSpecificsToValue(
+    const sync_pb::ExtensionSettingSpecifics& extension_setting_specifics);
+
 base::DictionaryValue* ExtensionSpecificsToValue(
     const sync_pb::ExtensionSpecifics& extension_specifics);
 
 base::DictionaryValue* NigoriSpecificsToValue(
     const sync_pb::NigoriSpecifics& nigori_specifics);
 
 base::DictionaryValue* PasswordSpecificsToValue(
     const sync_pb::PasswordSpecifics& password_specifics);
 
 base::DictionaryValue* PreferenceSpecificsToValue(
@@ skipping 12 matching lines @@
     const sync_pb::TypedUrlSpecifics& typed_url_specifics);
 
 // Any present extensions are mapped to sub-dictionary values with the
 // key equal to the extension name.
 base::DictionaryValue* EntitySpecificsToValue(
     const sync_pb::EntitySpecifics& entity_specifics);
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_PROTOCOL_PROTO_VALUE_CONVERSIONS_H_