Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/resources/intversion-revert-on-abort.js

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
 description("Test that integer versions are reverted when their version transactions abort.");
 
 function test()
 {
     removeVendorPrefixes();
@@ skipping 23 matching lines @@
 {
     preamble(evt);
     evalAndLog("db = event.target.result");
     shouldBe("db.version", "2");
     evalAndLog("db.close()");
     evalAndLog("request = indexedDB.open(dbname, 3)");
     evalAndLog("request.onupgradeneeded = secondUpgradeNeededCallback");
     evalAndLog("request.onerror = errorAfterAbortCallback");
     request.onsuccess = unexpectedSuccessCallback;
     request.onblocked = unexpectedBlockedCallback;
+    expectError();
 }
 
 function secondUpgradeNeededCallback(evt)
 {
     preamble(evt);
     evalAndLog("db = event.target.result");
     evalAndLog("db.createObjectStore('some os 2')");
     evalAndLog("event.target.transaction.abort()");
 }
 
@@ skipping 12 matching lines @@
 {
     preamble(evt);
     evalAndLog("db = event.target.result");
     shouldBe("db.version", "2");
     shouldBe("db.objectStoreNames.length", "1");
     shouldBeEqualToString("db.objectStoreNames[0]", "some os");
     finishJSTest();
 }
 
 test();