Big merge from experimental to bleeding edge.

tests/standalone/io/file_non_ascii_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:io';
 import 'dart:isolate';
 
 main() {
   ReceivePort port = new ReceivePort();
 
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                       });
                     });
                   });
                 });
               });
             });
           });
         });
       });
     });
+  }).catchError((e) {
+    port.close();
+    Expect.fail("File not found");
   });
 }