Rename unsubscribe to cancel.

sdk/lib/async/merge_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.async;
 
 class _SupercedeEntry<T> {
   final SupercedeStream stream;
   Stream<T> source;
   StreamSubscription subscription = null;
@@ skipping 22 matching lines @@
   void start() {
     assert(subscription == null);
     if (!isDone) {
       subscription =
           source.listen(onData, onError: onError, onDone: onDone);
     }
   }
 
   void stop() {
     if (!isDone) {
-      subscription.unsubscribe();
+      subscription.cancel();
       subscription = null;
     }
   }
 
   void pause() {
     if (!isDone) subscription.pause();
   }
 
   void resume() {
     if (!isDone) subscription.resume();
@@ skipping 103 matching lines @@
   final CyclicScheduleStream stream;
   /** A single source stream for the [CyclicScheduleStream]. */
   Stream source;
   /** The active subscription, if any. */
   StreamSubscription subscription = null;
   /** Next entry in a linked list of entries. */
   _CycleEntry next;
 
   _CycleEntry(this.stream, this.source);
 
-  void unsubscribe() {
+  void cancel() {
     // This method may be called event if this entry has never been activated.
     if (subscription != null) {
-      subscription.unsubscribe();
+      subscription.cancel();
       subscription = null;
     }
   }
 
   void pause() {
     ensureSubscribed();
     if (!subscription.isPaused) {
       subscription.pause();
     }
   }
@@ skipping 54 matching lines @@
     if (_hasSubscribers) {
       _currentEntry.activate();
       for (_CycleEntry entry = _currentEntry.next;
            entry != null;
            entry = entry.next) {
         entry.pause();
       }
       return;
     }
     for (_CycleEntry entry = _currentEntry; entry != null; entry = entry.next) {
-      entry.unsubscribe();
+      entry.cancel();
     }
   }
 
   void _onPauseStateChange() {
     if (_isPaused) {
       _currentEntry.pause();
     } else {
       _currentEntry.activate();
     }
   }
@@ skipping 17 matching lines @@
     if (_currentEntry.next == null) {
       _close();
       _currentEntry = _lastEntry = null;
     } else {
       // Remove the current entry from the list now that it's complete.
       _currentEntry = _currentEntry.next;
       _currentEntry.activate();
     }
   }
 }