[Sync] Replace all instances of ModelTypeSet with ModelEnumSet

chrome/browser/sync/glue/theme_model_associator.cc

Index: chrome/browser/sync/glue/theme_model_associator.cc
diff --git a/chrome/browser/sync/glue/theme_model_associator.cc b/chrome/browser/sync/glue/theme_model_associator.cc
index e4100411ea22c34f56c654a746522765cff3c1b2..9f1719638fa808b523be0d64f478411474f652fe 100644
--- a/chrome/browser/sync/glue/theme_model_associator.cc
+++ b/chrome/browser/sync/glue/theme_model_associator.cc
@@ -103,9 +103,9 @@ bool ThemeModelAssociator::SyncModelHasUserCreatedNodes(bool* has_nodes) {
 bool ThemeModelAssociator::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(syncable::THEMES) == 0 ||
+  const syncable::ModelEnumSet encrypted_types =
+      sync_api::GetEncryptedTypes(&trans);
+  return !encrypted_types.Has(syncable::THEMES) ||
          sync_service_->IsCryptographerReady(&trans);
 }