Rename unsubscribe to cancel.

sdk/lib/io/http_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.io;
 
 // The close queue handles graceful closing of HTTP connections. When
 // a connection is added to the queue it will enter a wait state
 // waiting for all data written and possibly socket shutdown from
 // peer.
@@ skipping 223 matching lines @@
   // Number of body bytes written. This is only actual body data not
   // including headers or chunk information of using chinked transfer
   // encoding.
   int _bodyBytesWritten = 0;
 }
 
 class _StreamingHttpRequestResponseBase extends _HttpRequestResponseBase {
   _StreamingHttpRequestResponseBase(_HttpConnectionBase connection)
     : super(connection);
 
-  StreamSubscription<T> subscribe({void onData(T event),
-                                   void onError(AsyncError error),
-                                   void onDone(),
-                                   bool unsubscribeOnError}) {
-    return _controller.stream.subscribe(onData: onData,
-                                        onError: onError,
-                                        onDone: onDone,
-                                        unsubscribeOnError: unsubscribeOnError);
+  StreamSubscription<T> listen(void onData(T event),
+                               { void onError(AsyncError error),
+                                 void onDone(),
+                                 bool unsubscribeOnError}) {
+    return _controller.stream.listen(onData,
+                                     onError: onError,
+                                     onDone: onDone,
+                                     unsubscribeOnError: unsubscribeOnError);
   }
 
   Stream transform({void onData(T data, StreamSink sink),
                     void onError(AsyncError errort, StreamSink sink),
                     void onDone(StreamSink sink)}) {
     return _controller.stream.transform(
         onData: onData,
         onError: onError,
         onDone: onDone);
   }
@@ skipping 2121 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }