[Sync] Move ModelType and related classes to 'syncer' namespace

sync/engine/all_status.cc

Index: sync/engine/all_status.cc
diff --git a/sync/engine/all_status.cc b/sync/engine/all_status.cc
index 8d96422fd841a9b47b20d0a4fc4ac72e573d672a..8f8b649acc1d027ac1fb12f2483079177c1006e8 100644
--- a/sync/engine/all_status.cc
+++ b/sync/engine/all_status.cc
@@ -135,12 +135,12 @@ void AllStatus::IncrementNotificationsReceived() {
   ++status_.notifications_received;
 }
 
-void AllStatus::SetEncryptedTypes(syncable::ModelTypeSet types) {
+void AllStatus::SetEncryptedTypes(syncer::ModelTypeSet types) {
   ScopedStatusLock lock(this);
   status_.encrypted_types = types;
 }
 
-void AllStatus::SetThrottledTypes(const syncable::ModelTypeSet& types) {
+void AllStatus::SetThrottledTypes(const syncer::ModelTypeSet& types) {
   ScopedStatusLock lock(this);
   status_.throttled_types = types;
 }