Unify dart:isolate.

lib/isolate/timer.dart

Index: lib/isolate/timer.dart
diff --git a/lib/isolate/timer.dart b/lib/isolate/timer.dart
index 95de18eb3b1c12b064f689f8e96bdcb95d2a8cc0..7ee16eabfa2a9ff6a1c87d51201fddeca307269b 100644
--- a/lib/isolate/timer.dart
+++ b/lib/isolate/timer.dart
@@ -20,3 +20,32 @@ interface Timer default _TimerFactory {
    */
   void cancel();
 }
+
+typedef Timer _TimerFactoryClosure(int milliSeconds,
+                                   void callback(Timer timer),
+                                   bool repeating);
+
+// _TimerFactory provides a hook which allows various implementations of this
+// library to provide a concrete class for the Timer interface.
+class _TimerFactory {
+  factory Timer(int milliSeconds, void callback(Timer timer)) {
+    if (_factory == null) {
+      throw new UnsupportedOperationException("Timer interface not supported.");
+    }
+    return _factory(milliSeconds, callback, false);
+  }
+
+  factory Timer.repeating(int milliSeconds,
+                                      void callback(Timer timer)) {

[Mads Ager (google), 2012/08/21 07:27:57]

Indentation is off here.

[Anders Johnsen, 2012/08/21 07:45:05]

Done.

+    if (_factory == null) {
+      throw new UnsupportedOperationException("Timer interface not supported.");
+    }
+    return _factory(milliSeconds, callback, true);
+  }
+
+  static _TimerFactoryClosure _factory;
+}
+
+void _setTimerFactoryClosure(_TimerFactoryClosure closure) {
+  _TimerFactory._factory = closure;
+}