Rename unsubscribe to cancel.

tests/isolate/stream_mangling_test.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.
 
 import 'dart:isolate';
 import '../../pkg/unittest/lib/unittest.dart';
 
 main() {
   test("Self referencing arrays serialize correctly", () {
     var messageBox = new MessageBox();
     var stream = messageBox.stream;
     var sink = messageBox.sink;
     var nested = [];
     nested.add(nested);
     Expect.identical(nested, nested[0]);
-    stream.subscribe(onData: expectAsync1((data) {
+    stream.listen(expectAsync1((data) {
       Expect.isFalse(identical(nested, data));
       Expect.isTrue(data is List);
       Expect.equals(1, data.length);
       Expect.identical(data, data[0]);
       stream.close();
     }));
     sink.add(nested);
   });
 
   test("Self referencing arrays serialize correctly 2", () {
     var messageBox = new MessageBox();
     var stream = messageBox.stream;
     var sink = messageBox.sink;
     var nested = [0, 1];
     nested.add(nested);
     nested.add(3);
     nested.add(4);
     Expect.identical(nested, nested[2]);
-    stream.subscribe(onData: expectAsync1((data) {
+    stream.listen(expectAsync1((data) {
       Expect.isFalse(identical(nested, data));
       Expect.isTrue(data is List);
       Expect.equals(5, data.length);
       Expect.identical(data, data[2]);
       Expect.equals(0, data[0]);
       Expect.equals(1, data[1]);
       Expect.equals(3, data[3]);
       Expect.equals(4, data[4]);
       stream.close();
     }));
     sink.add(nested);
   });
 
   test("Self referencing arrays serialize correctly 3", () {
     var messageBox = new MessageBox();
     var stream = messageBox.stream;
     var sink = messageBox.sink;
     var nested = [[[[[0, 1]]]]];
     nested.add(nested);
     nested[0][0][0][0].add(nested);
     nested.add(3);
     nested.add(4);
     Expect.identical(nested, nested[0][0][0][0][2]);
-    stream.subscribe(onData: expectAsync1((data) {
+    stream.listen(expectAsync1((data) {
       Expect.isFalse(identical(nested, data));
       Expect.isTrue(data is List);
       Expect.equals(4, data.length);
       Expect.equals(1, data[0].length);
       Expect.equals(1, data[0][0].length);
       Expect.equals(1, data[0][0][0].length);
       Expect.equals(3, data[0][0][0][0].length);
       Expect.identical(data, data[0][0][0][0][2]);
       Expect.identical(data, data[1]);
       Expect.equals(3, data[2]);
       Expect.equals(4, data[3]);
       stream.close();
     }));
     sink.add(nested);
   });
 
   test("Self referencing maps serialize correctly", () {
     var messageBox = new MessageBox();
     var stream = messageBox.stream;
     var sink = messageBox.sink;
     var nested = {};
     nested["foo"] = nested;
     Expect.identical(nested, nested["foo"]);
-    stream.subscribe(onData: expectAsync1((data) {
+    stream.listen(expectAsync1((data) {
       Expect.isFalse(identical(nested, data));
       Expect.isTrue(data is Map);
       Expect.equals(1, data.length);
       Expect.identical(data, data["foo"]);
       stream.close();
     }));
     sink.add(nested);
   });
 
   test("Sending of IsolateSinks", () {
     // TODO(floitsch): add test.
   });
 
   test("Sending of IsolateSinks in complicated structures", () {
     // TODO(floitsch): add test.
   });
 }