Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/resources/index-multientry.js

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
 description("Test features of IndexedDB's multiEntry indices.");
 
 indexedDBTest(prepareDatabase, addData);
 function prepareDatabase()
 {
@@ skipping 85 matching lines @@
         request.onerror = unexpectedErrorCallback;
         request.onsuccess = function() {
             debug("success!");
             debug("This should fail the uniqueness constraint on the index, and fail:");
             request = evalAndLog("transaction.objectStore('store-unique').put({x: [5, 2], y: 'c'}, 'should fail')");
             request.onsuccess = unexpectedSuccessCallback;
             request.onerror = function() {
                 shouldBeUndefined("request.result");
                 shouldBeNonNull("request.error");
                 debug("Request failed, as expected (" + request.error.name + ")");
+                expectError();
             };
         };
     };
 }
 
 function verifyCount(callback) {
     evalAndLog("transaction = db.transaction(['store'])");
 
     transaction.onabort = unexpectedAbortCallback;
     transaction.oncomplete = callback;
@@ skipping 23 matching lines @@
     request.onupgradeneeded = function() {
         evalAndLog("db = event.target.result");
         evalAndLog("trans = event.target.transaction");
         trans.onabort = unexpectedAbortCallback;
 
         store = evalAndLog("store = trans.objectStore('store')");
         evalAndLog("store.createIndex('index-new', 'x', {multiEntry: true})");
     };
     request.onsuccess = function() { verifyIndexes('index-new', finishJSTest); };
 }