Unify Object implementation across dart2js and VM.

runtime/lib/object.dart

Index: runtime/lib/object.dart
diff --git a/runtime/lib/object.dart b/runtime/lib/object.dart
deleted file mode 100644
index fe749908b0c7f10eefef80454674f216c969d21c..0000000000000000000000000000000000000000
--- a/runtime/lib/object.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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 Object {
-  const Object();
-  String toString() native "Object_toString";
-  bool operator ==(other) {
-    return this === other;
-  }
-  void noSuchMethod(String functionName, List args) native "Object_noSuchMethod";
-
-  /**
-   * Return this object without type information.
-   */
-  get dynamic() { return this; }
-}