Add Future.timeout.

pkg/barback/lib/src/cancelable_future.dart

Index: pkg/barback/lib/src/cancelable_future.dart
diff --git a/pkg/barback/lib/src/cancelable_future.dart b/pkg/barback/lib/src/cancelable_future.dart
index 284df411362d8dbcfd0af110d37c960a4f7b5625..d15c1a2c32c11c556321179e6f4daf59b245b438 100644
--- a/pkg/barback/lib/src/cancelable_future.dart
+++ b/pkg/barback/lib/src/cancelable_future.dart
@@ -32,7 +32,8 @@ class CancelableFuture<T> implements Future<T> {
   Future then(onValue(T value), {Function onError}) =>
     _completer.future.then(onValue, onError: onError);
   Future<T> whenComplete(action()) => _completer.future.whenComplete(action);
-
+  Future timeout(Duration timeLimit, [void onTimeout()]) =>
+      _completer.future.timeout(timeLimit, onTimeout);

[nweiz, 2013/11/27 20:50:36]

Style nit: indent two spaces. Same for other files.

[Lasse Reichstein Nielsen, 2013/11/28 08:11:24]

Done, for consistency, but I'm fairly sure the style guide wants four spaces
here. It's a continued line, and not a nested code block. The one example that
uses the syntax is:
bobLikes() =>
    isDeepFried || (hasPieCrust && !vegan) || containsBacon;
and it uses four spaces.

   /// Cancels this future.
   void cancel() {
     _canceled = true;