Reapply expanding overloaded functions into separate functions.

tests/html/indexeddb_4_test.dart

 library IndexedDB4Test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:async';
 import 'dart:html' as html;
 import 'dart:indexed_db';
 
 // Test for KeyRange and Cursor.
 
 const String DB_NAME = 'Test4';
 const String STORE_NAME = 'TEST';
 const int VERSION = 1;
 
 Future<Database> createAndOpenDb() {
   return html.window.indexedDB.deleteDatabase(DB_NAME).then((_) {
     return html.window.indexedDB.open(DB_NAME, version: VERSION,
         onUpgradeNeeded: (e) {
           var db = e.target.result;
           db.createObjectStore(STORE_NAME);
         });
   });
 }
 
 Future<Database> writeItems(Database db) {
   Future<Object> write(index) {
-    var transaction = db.transaction([STORE_NAME], 'readwrite');
+    var transaction = db.transaction(STORE_NAME, 'readwrite');
     return transaction.objectStore(STORE_NAME).put(
         {'content': 'Item $index'}, index);
   }
 
   var future = write(0);
   for (var i = 1; i < 100; ++i) {
     future = future.then((_) => write(i));
   }
 
   // Chain on the DB so we return it at the end.
@@ skipping 86 matching lines @@
 
     bound4() =>
         // OPTIONALS testRange(db, new KeyRange.bound(20, 30, lowerOpen: true),
         testRange(db, new KeyRange.bound(20, 30, true), 21, 30);
 
     bound5() =>
         // OPTIONALS testRange(db, new KeyRange.bound(20, 30, lowerOpen: true, upperOpen: true),
         testRange(db, new KeyRange.bound(20, 30, true, true), 21, 29);
   }
 }