Create a fresh sync datatype for Synced Notifications

sync/protocol/proto_value_conversions.h

Index: sync/protocol/proto_value_conversions.h
diff --git a/sync/protocol/proto_value_conversions.h b/sync/protocol/proto_value_conversions.h
index 5c150ceee0865fe762c8e31c40f72589c2e7289c..a553e56b28aa4383775b315c159520d2a5672174 100644
--- a/sync/protocol/proto_value_conversions.h
+++ b/sync/protocol/proto_value_conversions.h
@@ -49,6 +49,7 @@ class SessionSpecifics;
 class SessionTab;
 class SessionWindow;
 class SyncCycleCompletedEventInfo;
+class SyncedNotificationSpecifics;
 class TabNavigation;
 class ThemeSpecifics;
 class TimeRangeDirective;
@@ -159,6 +160,10 @@ SYNC_EXPORT_PRIVATE base::DictionaryValue* PasswordSpecificsToValue(
 SYNC_EXPORT_PRIVATE base::DictionaryValue* PreferenceSpecificsToValue(
     const sync_pb::PreferenceSpecifics& password_specifics);
 
+SYNC_EXPORT_PRIVATE base::DictionaryValue* SyncedNotificationSpecificsToValue(
+    const sync_pb::SyncedNotificationSpecifics&
+    synced_notification_specifics);
+
 SYNC_EXPORT_PRIVATE base::DictionaryValue* SearchEngineSpecificsToValue(
     const sync_pb::SearchEngineSpecifics& search_engine_specifics);