Add a couple of notifications related settings to app/extensions sync:

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 AppNotificationSettings;
 class AppNotificationSpecifics;
 class AppSpecifics;
 class AutofillProfileSpecifics;
 class AutofillSpecifics;
 class BookmarkSpecifics;
 class EncryptedData;
 class EntitySpecifics;
 class ExtensionSettingSpecifics;
 class ExtensionSpecifics;
 class NigoriSpecifics;
@@ skipping 21 matching lines @@
 
 namespace browser_sync {
 
 // Ownership of all returned DictionaryValues are transferred to the
 // caller.
 
 // TODO(akalin): Perhaps extend this to decrypt?
 base::DictionaryValue* EncryptedDataToValue(
     const sync_pb::EncryptedData& encrypted_data);
 
+// Sub-protocol of AppSpecifics.
+base::DictionaryValue* AppSettingsToValue(
+    const sync_pb::AppNotificationSettings& app_notification_settings);
+
 // Sub-protocols of SessionSpecifics.
 
 base::DictionaryValue* SessionHeaderToValue(
     const sync_pb::SessionHeader& session_header);
 
 base::DictionaryValue* SessionTabToValue(
     const sync_pb::SessionTab& session_tab);
 
 base::DictionaryValue* SessionWindowToValue(
     const sync_pb::SessionWindow& session_window);
@@ skipping 51 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_