[Sync] Convert syncable/ directory to ModelEnumSet

chrome/browser/sync/test/engine/mock_connection_manager.h

Index: chrome/browser/sync/test/engine/mock_connection_manager.h
diff --git a/chrome/browser/sync/test/engine/mock_connection_manager.h b/chrome/browser/sync/test/engine/mock_connection_manager.h
index 2d2be847f3c4bc84fcb821aedfa32d5cec71cc51..786672dd5f164211bfdf789a076cd373c08fd118 100644
--- a/chrome/browser/sync/test/engine/mock_connection_manager.h
+++ b/chrome/browser/sync/test/engine/mock_connection_manager.h
@@ -207,7 +207,7 @@ class MockConnectionManager : public browser_sync::ServerConnectionManager {
   // Expect that GetUpdates will request exactly the types indicated in
   // the bitset.
   void ExpectGetUpdatesRequestTypes(
-      std::bitset<syncable::MODEL_TYPE_COUNT> expected_filter) {
+      syncable::ModelEnumSet expected_filter) {
     expected_filter_ = expected_filter;
   }
 
@@ -344,7 +344,7 @@ class MockConnectionManager : public browser_sync::ServerConnectionManager {
   // use the older sync_pb::SyncEntity_BookmarkData-style protocol.
   bool use_legacy_bookmarks_protocol_;
 
-  std::bitset<syncable::MODEL_TYPE_COUNT> expected_filter_;
+  syncable::ModelEnumSet expected_filter_;
 
   syncable::ModelTypePayloadMap expected_payloads_;