Fix dart2js analyze _api_test for dart:io

sdk/lib/io/timer_impl.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 class _Timer implements Timer {
   // Set jitter to wake up timer events that would happen in _TIMER_JITTER ms.
   static const int _TIMER_JITTER = 0;
 
   // Disables the timer.
   static const int _NO_TIMER = -1;
 
   static Timer _createTimer(void callback(Timer timer),
                            int milliSeconds,
                            bool repeating) {
     _EventHandler._start();
     if (_timers == null) {
       _timers = new DoubleLinkedQueue<_Timer>();
     }
-    Timer timer = new _Timer._internal();
+    _Timer timer = new _Timer._internal();
     timer._callback = callback;
     timer._milliSeconds = milliSeconds;
     timer._wakeupTime = (new DateTime.now()).millisecondsSinceEpoch + milliSeconds;
     timer._repeating = repeating;
     timer._addTimerToList();
     timer._notifyEventHandler();
     return timer;
   }
 
   factory _Timer(int milliSeconds, void callback(Timer timer)) {
@@ skipping 161 matching lines @@
 _getTimerFactoryClosure() {
   return (int milliSeconds, void callback(Timer timer), bool repeating) {
     if (repeating) {
       return new _Timer.repeating(milliSeconds, callback);
     }
     return new _Timer(milliSeconds, callback);
   };
 }