Add script attribute to Options class, providing the name of the running script.

corelib/src/implementation/options.dart

 // Copyright (c) 2011, 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 RuntimeOptions implements Options {
   List<String> get arguments() {
     if (_arguments === null) {
       // On first access make a copy of the native arguments.
       _arguments = _nativeArguments.getRange(0, _nativeArguments.length);
     }
     return _arguments;
   }
 
+  String get script() {
+    return _nativeScript;
+  }
+
   List<String> _arguments = null;
 
   // This arguments singleton is overriden by the embedder if applicable.

[Mads Ager (google), 2012/01/20 11:38:03]

overridden?

[Bill Hesse, 2012/01/20 16:05:58]

written, written to.

   static List<String> _nativeArguments = const [];
+
+  static String _nativeScript = null;

[Mads Ager (google), 2012/01/20 11:38:03]

Add a comment similar to the one above that this is overridden by the embedder?

 }