Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/resources/transaction-abort.js

Index: LayoutTests/storage/indexeddb/resources/transaction-abort.js
diff --git a/LayoutTests/storage/indexeddb/resources/transaction-abort.js b/LayoutTests/storage/indexeddb/resources/transaction-abort.js
index 3cd2a825ca2dd8ca075db43971649a7919c29eb6..c832778b1447e06287f40a3570a9e5d26988d6bc 100644
--- a/LayoutTests/storage/indexeddb/resources/transaction-abort.js
+++ b/LayoutTests/storage/indexeddb/resources/transaction-abort.js
@@ -33,8 +33,10 @@ function startTest()
     abortFired = false;
 }
 
-function firstAdd()
+function firstAdd(evt)
 {
+    evt.preventDefault();
+
     shouldBe("event.target.error.name", "'AbortError'");
     shouldBeNull("trans.error");
     shouldBeFalse("firstError");
@@ -45,8 +47,10 @@ function firstAdd()
     evalAndExpectException("store.add({x: 'value4', y: 'zzz4'}, 'key4')", "0", "'TransactionInactiveError'");
 }
 
-function secondAdd()
+function secondAdd(evt)
 {
+    evt.preventDefault();
+
     shouldBe("event.target.error.name", "'AbortError'");
     shouldBeNull("trans.error");
     shouldBeTrue("firstError");