Rename unsubscribeOnError to cancelOnError.

sdk/lib/isolate/isolate_stream.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.isolate;
 
 /**
  * The initial [IsolateStream] available by default for this isolate. This
  * [IsolateStream] is created automatically and it is commonly used to establish
  * the first communication between isolates (see [streamSpawnFunction] and
@@ skipping 61 matching lines @@
     if (!_isClosed) {
       _isClosed = true;
       _port.close();
       _controller.close();
     }
   }
 
   StreamSubscription listen(void onData(event),
                             { void onError(AsyncError error),
                               void onDone(),
-                              bool unsubscribeOnError}) {
+                              bool cancelOnError}) {
       return _controller.stream.listen(onData,
                                        onError: onError,
                                        onDone: onDone,
-                                       unsubscribeOnError: unsubscribeOnError);
+                                       cancelOnError: cancelOnError);
   }
 }
 
 /**
  * [IsolateSink]s represent the feed for [IsolateStream]s. Any message written
  * to [this] is delivered to its respective [IsolateStream]. [IsolateSink]s are
  * created by [MessageBox]es.
  *
  * [IsolateSink]s can be transmitted to other isolates.
  */
@@ skipping 44 matching lines @@
  * default stream.
  *
  * The optional [unhandledExceptionCallback] argument is invoked whenever an
  * exception inside the isolate is unhandled. It can be seen as a big
  * `try/catch` around everything that is executed inside the isolate. The
  * callback should return `true` when it was able to handled the exception.
  */
 external IsolateSink streamSpawnFunction(
     void topLevelFunction(),
     [bool unhandledExceptionCallback(IsolateUnhandledException e)]);