Renamed StreamSink to EventSink. Renamed signalError to addError.

sdk/lib/io/io_sink.dart

 // Copyright (c) 2013, 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.io;
 
 /**
  * Helper class to wrap a [StreamConsumer<List<int>, T>] and provide utility
  * functions for writing to the StreamConsumer directly. The [IOSink]
  * buffers the input given by [add] and [addString] and will delay a [consume]
@@ skipping 159 matching lines @@
     }
     _bindSubscription = stream.listen(
         _controller.add,
         onDone: () {
           if (unbind) {
             completeUnbind();
           } else {
             _controller.close();
           }
         },
-        onError: _controller.signalError);
+        onError: _controller.addError);
     if (_paused) _pause();
     if (unbind) {
       _pipeFuture
           .then((_) => completeUnbind(),
                 onError: (error) => completeUnbind(error));
       return unbindCompleter.future;
     } else {
       return _pipeFuture.then((_) => this);
     }
   }
 }