Moved RuntimeOptions from coreimpl to core, renamed to _OptionsImpl.

lib/coreimpl/options.dart

Index: lib/coreimpl/options.dart
diff --git a/lib/coreimpl/options.dart b/lib/coreimpl/options.dart
deleted file mode 100644
index 87f70e277968257ed15113abdd9e8f7a10f396a0..0000000000000000000000000000000000000000
--- a/lib/coreimpl/options.dart
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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 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 executable {
-    return _nativeExecutable;
-  }
-
-  String get script {
-    return _nativeScript;
-  }
-
-  List<String> _arguments = null;
-
-  // This arguments singleton is written to by the embedder if applicable.
-  static List<String> _nativeArguments = const [];
-
-  // This executable singleton is written to by the embedder if applicable.
-  static String _nativeExecutable = '';
-
-  // This script singleton is written to by the embedder if applicable.
-  static String _nativeScript = '';
-}