EmptyType 160 Source/modules/filesystem/SyncCallbackHelper.h struct EmptyType : public RefCountedWillBeGarbageCollected<EmptyType> { EmptyType 161 Source/modules/filesystem/SyncCallbackHelper.h static PassRefPtrWillBeRawPtr<EmptyType> create(EmptyType*) EmptyType 171 Source/modules/filesystem/SyncCallbackHelper.h typedef SyncCallbackHelper<VoidCallback, EmptyType*, EmptyType> VoidSyncCallbackHelper;