Change singleSubscription/multiSubscription to normal/broadcast.

sdk/lib/async/stream_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.
 
 part of dart.async;
 
 // States shared by single/multi stream implementations.
 
 /// Initial and default state where the stream can receive and send events.
 const int _STREAM_OPEN = 0;
@@ skipping 526 matching lines @@
 class _MultiStreamImpl<T> extends _StreamImpl<T>
                           implements _InternalLinkList {
   // Link list implementation (mixin when possible).
   _InternalLink _nextLink;
   _InternalLink _previousLink;
 
   _MultiStreamImpl() {
     _nextLink = _previousLink = this;
   }
 
-  bool get isSingleSubscription => false;
+  bool get isBroadcast => true;
 
-  Stream<T> asMultiSubscriberStream() => this;
+  Stream<T> asBroadcastStream() => this;
 
   // ------------------------------------------------------------------
   // Helper functions that can be overridden in subclasses.
 
   /** Whether there are currently any subscribers on this [Stream]. */
   bool get _hasSubscribers => !_InternalLinkList.isEmpty(this);
 
   /**
    * Create the new subscription object.
    */
@@ skipping 599 matching lines @@
                                      onError: this._signalError,
                                      onDone: this._close);
     } else {
       // TODO(lrn): Check why this can happen.
       if (_subscription == null) return;
       _subscription.cancel();
       _subscription = null;
     }
   }
 }