[Sync] Rename ModelEnumSet to ModelTypeSet

chrome/browser/sync/test/null_directory_change_delegate.cc

Index: chrome/browser/sync/test/null_directory_change_delegate.cc
diff --git a/chrome/browser/sync/test/null_directory_change_delegate.cc b/chrome/browser/sync/test/null_directory_change_delegate.cc
index 2b977efc8a3416584a9c3378ffc191ff6919def8..15d3cc13787d405d080397d3b737d14e0d9e28d6 100644
--- a/chrome/browser/sync/test/null_directory_change_delegate.cc
+++ b/chrome/browser/sync/test/null_directory_change_delegate.cc
@@ -16,14 +16,14 @@ void NullDirectoryChangeDelegate::HandleCalculateChangesChangeEventFromSyncer(
     const ImmutableWriteTransactionInfo& write_transaction_info,
     BaseTransaction* trans) {}
 
-ModelEnumSet
+ModelTypeSet
     NullDirectoryChangeDelegate::HandleTransactionEndingChangeEvent(
         const ImmutableWriteTransactionInfo& write_transaction_info,
         BaseTransaction* trans) {
-  return ModelEnumSet();
+  return ModelTypeSet();
 }
 
 void NullDirectoryChangeDelegate::HandleTransactionCompleteChangeEvent(
-    ModelEnumSet models_with_changes) {}
+    ModelTypeSet models_with_changes) {}
 
 }  // namespace syncable