Merge IO v2 branch to bleeding edge

tests/standalone/io/directory_error_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.
 //
 // Dart test program for testing error handling in directory I/O.
 
+import "dart:async";
 import "dart:io";
 import "dart:isolate";
 
 Directory tempDir() {
   return new Directory('').createTempSync();
 }
 
 
 bool checkCreateInNonExistentFileException(e) {
   Expect.isTrue(e is DirectoryIOException);
@@ skipping 109 matching lines @@
   } else if (Platform.operatingSystem == "macos") {
     Expect.equals(2, e.osError.errorCode);
   } else if (Platform.operatingSystem == "windows") {
     Expect.equals(3, e.osError.errorCode);
   }
 
   return true;
 }
 
 
+bool checkAsyncListNonExistentFileException(e) {
+  Expect.isTrue(e is AsyncError);
+  return checkListNonExistentFileException(e.error);
+}
+
+
 void testListNonExistent(Directory temp, Function done) {
   Directory nonExistent = new Directory("${temp.path}/nonExistent");
   Expect.throws(() => nonExistent.listSync(), (e) => e is DirectoryIOException);
-  var lister = nonExistent.list();
-  lister.onError = (e) {
-    checkListNonExistentFileException(e);
-    done();
-  };
+  nonExistent.list().listen(
+      (_) => Expect.fail("listing should not succeed"),
+      onError: (e) {
+        checkAsyncListNonExistentFileException(e);
+        done();
+      });
 }
 
 
 void testRenameNonExistent(Directory temp, Function done) {
   Directory nonExistent = new Directory("${temp.path}/nonExistent");
   var newPath = "${temp.path}/nonExistent2";
   Expect.throws(() => nonExistent.renameSync(newPath),
                 (e) => e is DirectoryIOException);
   var renameDone = nonExistent.rename(newPath);
   renameDone.then((ignore) => Expect.fail('rename non existent'))
@@ skipping 56 matching lines @@
 main() {
   runTest(testCreateInNonExistent);
   runTest(testCreateTempInNonExistent);
   runTest(testDeleteNonExistent);
   runTest(testDeleteRecursivelyNonExistent);
   runTest(testListNonExistent);
   runTest(testRenameNonExistent);
   runTest(testRenameFileAsDirectory);
   runTest(testRenameOverwriteFile);
 }