[Sync] Replace all instances of ModelTypeSet with ModelEnumSet

chrome/browser/sync/glue/session_model_associator.cc

Index: chrome/browser/sync/glue/session_model_associator.cc
diff --git a/chrome/browser/sync/glue/session_model_associator.cc b/chrome/browser/sync/glue/session_model_associator.cc
index 44c0727dd94fc058ecafb0b3533ea1d757c882bc..445501468781d6d4b8962fded9cd507523710efd 100644
--- a/chrome/browser/sync/glue/session_model_associator.cc
+++ b/chrome/browser/sync/glue/session_model_associator.cc
@@ -1247,9 +1247,8 @@ void SessionModelAssociator::PopulateSessionSpecificsTab(
 bool SessionModelAssociator::CryptoReadyIfNecessary() {
   // We only access the cryptographer while holding a transaction.
   sync_api::ReadTransaction trans(FROM_HERE, sync_service_->GetUserShare());
-  syncable::ModelTypeSet encrypted_types;
-  encrypted_types = sync_api::GetEncryptedTypes(&trans);
-  return encrypted_types.count(SESSIONS) == 0 ||
+  syncable::ModelEnumSet encrypted_types = sync_api::GetEncryptedTypes(&trans);
+  return !encrypted_types.Has(SESSIONS) ||
          sync_service_->IsCryptographerReady(&trans);
 }