Update to latest protobufs to match the server side.

chrome/browser/notifications/sync_notifier/synced_notification.cc

Index: chrome/browser/notifications/sync_notifier/synced_notification.cc
diff --git a/chrome/browser/notifications/sync_notifier/synced_notification.cc b/chrome/browser/notifications/sync_notifier/synced_notification.cc
index a7425630b9797cc3ae29dcf1a74d795e1dbb5939..69224f715e6ffdf9f3bd64ce4c4fc0ec2966a206 100644
--- a/chrome/browser/notifications/sync_notifier/synced_notification.cc
+++ b/chrome/browser/notifications/sync_notifier/synced_notification.cc
@@ -505,10 +505,10 @@ int SyncedNotification::GetPriority() const {
 
   // Convert the prioroty to the scheme used by the notification center.
   if (protobuf_priority ==
-      sync_pb::CoalescedSyncedNotification_Priority_LOW) {
+      sync_pb::CoalescedSyncedNotification_Priority_INVISIBLE) {
     return message_center::LOW_PRIORITY;
   } else if (protobuf_priority ==
-             sync_pb::CoalescedSyncedNotification_Priority_STANDARD) {
+             sync_pb::CoalescedSyncedNotification_Priority_LOW) {
     return message_center::DEFAULT_PRIORITY;
   } else if (protobuf_priority ==
              sync_pb::CoalescedSyncedNotification_Priority_HIGH) {
@@ -516,7 +516,7 @@ int SyncedNotification::GetPriority() const {
   } else {
     // Complain if this is a new priority we have not seen before.
     DCHECK(protobuf_priority <
-           sync_pb::CoalescedSyncedNotification_Priority_LOW  ||
+           sync_pb::CoalescedSyncedNotification_Priority_INVISIBLE  ||
            sync_pb::CoalescedSyncedNotification_Priority_HIGH <
            protobuf_priority);
     return kUndefinedPriority;