| Index: sdk/lib/async/stream_pipe.dart
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| diff --git a/sdk/lib/async/stream_pipe.dart b/sdk/lib/async/stream_pipe.dart
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| index 34609924561d0f159ffc7c3595d4616dca61882c..1945bb263feb147028ac16725321baa858e494ef 100644
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| --- a/sdk/lib/async/stream_pipe.dart
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| +++ b/sdk/lib/async/stream_pipe.dart
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| @@ -51,7 +51,9 @@ abstract class _ForwardingStream<S, T> extends Stream<T> {
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|  
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|    _ForwardingStream(this._source);
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|  
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| -  bool get isSingleSubscription => _source.isSingleSubscription;
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| +  bool get isBroadcast => _source.isBroadcast;
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| +
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| +  bool asBroadcastStream() => _source.asBroadcastStream;
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|  
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|    StreamSubscription listen(void onData(T value),
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|                              { void onError(AsyncError error),
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| 
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