- Move the Timer interface to the dart:isolate library so that it

runtime/bin/timer_impl.dart

 // Copyright (c) 2012, 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.
 
 class _Timer implements Timer {
   // Set jitter to wake up timer events that would happen in _TIMER_JITTER ms.
   static final int _TIMER_JITTER = 0;
 
   // Disables the timer.
   static final int _NO_TIMER = -1;
@@ skipping 168 matching lines @@
 
   static ReceivePort _receivePort;
   static bool _handling_callbacks = false;
 
   var _callback;
   int _milliSeconds;
   int _wakeupTime;
   bool _repeating;
 }
 
+// Provide a closure which will allocate a Timer object to be able to hook
+// up the Timer interface in dart:isolate with the implementation here.
+_getTimerFactoryClosure() {
+  return (int milliSeconds, void callback(Timer timer), bool repeating) {
+    if (repeating) {
+      return new _Timer.repeating(milliSeconds, callback);
+    }
+    return new _Timer(milliSeconds, callback);
+  };
+}
+
+