Rename OutOfMemoryException to OutOfMemoryError.

lib/core/errors.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.
 
 class Error {
   const Error();
 }
 
 class AssertionError implements Error {
 }
@@ skipping 111 matching lines @@
         .replaceAll('\n', '${backslash}n')
         .replaceAll('\r', '${backslash}r')
         .replaceAll('"',  '$backslash"');
       return '"$escaped"';
     }
     return _objectToString(object);
   }
 
   external static String _objectToString(Object object);
 }
+
+
+class OutOfMemoryError implements Exception {
+  const OutOfMemoryError();
+  String toString() => "Out of Memory";
+}