Zone support for Futures.

sdk/lib/async/event_loop.dart

Index: sdk/lib/async/event_loop.dart
diff --git a/sdk/lib/async/event_loop.dart b/sdk/lib/async/event_loop.dart
index 3ceccd2c95766d8c04d365f52c388a409c46b6bd..8d0a0425efc5612307f7d58b22d7a2f275bbb07e 100644
--- a/sdk/lib/async/event_loop.dart
+++ b/sdk/lib/async/event_loop.dart
@@ -38,6 +38,16 @@ void _asyncRunCallback() {
   _callbacksAreEnqueued = false;
 }
 
+void _scheduleAsyncCallback(callback) {
+  // Optimizing a group of Timer.run callbacks to be executed in the
+  // same Timer callback.
+  _asyncCallbacks.add(callback);
+  if (!_callbacksAreEnqueued) {
+    _AsyncRun._enqueueImmediate(_asyncRunCallback);
+    _callbacksAreEnqueued = true;
+  }
+}
+
 /**
  * Runs the given [callback] asynchronously.
  *
@@ -58,13 +68,7 @@ void _asyncRunCallback() {
  *     }
  */
 void runAsync(void callback()) {
-  // Optimizing a group of Timer.run callbacks to be executed in the
-  // same Timer callback.
-  _asyncCallbacks.add(callback);
-  if (!_callbacksAreEnqueued) {
-    _AsyncRun._enqueueImmediate(_asyncRunCallback);
-    _callbacksAreEnqueued = true;
-  }
+  _Zone._current.runAsync(callback);
 }
 
 class _AsyncRun {