IndexedDB: Prevent terminated worker from hanging connections

Source/modules/indexeddb/IDBTransactionTest.cpp

Index: Source/modules/indexeddb/IDBTransactionTest.cpp
diff --git a/Source/modules/indexeddb/IDBTransactionTest.cpp b/Source/modules/indexeddb/IDBTransactionTest.cpp
index a6b815a63b8b46f377825e43795dbda60416d983..254dd74de56f8a7d803b8afb543edf784ed268b3 100644
--- a/Source/modules/indexeddb/IDBTransactionTest.cpp
+++ b/Source/modules/indexeddb/IDBTransactionTest.cpp
@@ -145,6 +145,9 @@ TEST_F(IDBTransactionTest, TransactionFinish)
     // Fire an abort to make sure this doesn't free the transaction during use. The test
     // will not fail if it is, but ASAN would notice the error.
     db->onAbort(transactionId, DOMError::create(AbortError, "Aborted"));
+
+    // onAbort() should have cleared the transaction's reference to the database.
+    EXPECT_EQ(1, db->refCount());
 }
 
 } // namespace