Fixing Indexed DB supported check.

tests/html/indexeddb_5_test.dart

 library IndexedDB1Test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:async';
 import 'dart:html' as html;
 import 'dart:indexed_db' as idb;
 import 'utils.dart';
 
 main() {
   useHtmlIndividualConfiguration();
-  if (!idb.IdbFactory.supported) {
-    return;
-  }
 
   group('supportsDatabaseNames', () {
     test('supported', () {
       expect(html.window.indexedDB.supportsDatabaseNames, isTrue);
     });
   });
 
+  if (!idb.IdbFactory.supported) {
+    return;
+  }
+
   group('functional', () {
     var dbName = 'test_db';
     var storeName = 'test_store';
     var indexName = 'name_index';
     var db;
 
     futureTest('init', () {
       return html.window.indexedDB.deleteDatabase(dbName).then((_) {
         return html.window.indexedDB.open(dbName, version: 1,
           onUpgradeNeeded: (e) {
@@ skipping 151 matching lines @@
         transaction = db.transaction([storeName], 'readonly');
         var index = transaction.objectStore(storeName).index(indexName);
         return index.get('two');
       }).then((readValue) {
         expect(readValue, isNull);
         return transaction.completed;
       });
     });
   });
 }