Adapt streams for additional stackTrace argument.

R=lrn@google.com

Review URL: https://codereview.chromium.org//25094002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@28511 260f80e4-7a28-3924-810f-c04153c831b5

pkgs/watcher/lib/src/directory_watcher.dart

diff --git a/pkgs/watcher/lib/src/directory_watcher.dart b/pkgs/watcher/lib/src/directory_watcher.dart
index 16a5cf1..3b39f5a 100644
--- a/pkgs/watcher/lib/src/directory_watcher.dart
+++ b/pkgs/watcher/lib/src/directory_watcher.dart
@@ -133,11 +133,11 @@
 
       if (entity is! File) return;
       _filesToProcess.add(entity.path);
-    }, onError: (error) {
+    }, onError: (error, StackTrace stackTrace) {
       if (!isDirectoryNotFoundException(error)) {
         // It's some unknown error. Pipe it over to the event stream so the
         // user can see it.
-        _events.addError(error);
+        _events.addError(error, stackTrace);
       }
 
       // When an error occurs, we end the listing normally, which has the