Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/resources/delete-in-upgradeneeded-close-in-versionchange.js

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
 description("Test that a deleteDatabase called while handling an upgradeneeded event is queued and fires its events at the right time. The close() call to unblock the delete occurs in the connection's 'versionchange' event handler.");
 
 function test()
 {
     removeVendorPrefixes();
     setDBNameFromPath();
 
     request = evalAndLog("indexedDB.deleteDatabase(dbname)");
     request.onsuccess = initiallyDeleted;
     request.onerror = unexpectedErrorCallback;
 }
 
 var sawUpgradeNeeded = false;
 var sawVersionChange = false;
+var sawOpenError = false;
 
 function initiallyDeleted(evt) {
     preamble(evt);
     evalAndLog("request = indexedDB.open(dbname, 1)");
     request.onupgradeneeded = upgradeNeededCallback;
     request.onsuccess = unexpectedSuccessCallback;
+    request.onerror = openError;
+}
+
+function openError(evt) {
+    preamble(evt);
+    shouldBeTrue("sawVersionChange");
+    evalAndLog("sawOpenError = true");
+    evt.preventDefault();
 }
 
 function upgradeNeededCallback(evt)
 {
     preamble(evt);
     shouldBeFalse("sawUpgradeNeeded");
     evalAndLog("sawUpgradeNeeded = true");
     shouldBe("event.oldVersion", "0");
     shouldBe("event.newVersion", "1");
 
@@ skipping 12 matching lines @@
     evalAndLog("sawVersionChange = true");
 
     debug("Closing the connection before the IDBOpenDBRequest's success fires will cause the open to fail.");
     evalAndLog("db.close()");
 }
 
 function deleteSuccessCallback(evt)
 {
     preamble(evt);
     shouldBeTrue("sawVersionChange");
+    shouldBeTrue("sawOpenError");
     shouldBeTrue("sawUpgradeNeeded");
     finishJSTest();
 }
 
 test();