First corelib cleanup patch after unification.

lib/compiler/implementation/lib/core_patch.dart

Index: lib/compiler/implementation/lib/core_patch.dart
diff --git a/lib/compiler/implementation/lib/core_patch.dart b/lib/compiler/implementation/lib/core_patch.dart
new file mode 100644
index 0000000000000000000000000000000000000000..aea4c6c7c2e0df68062931c651de31cddc668398
--- /dev/null
+++ b/lib/compiler/implementation/lib/core_patch.dart
@@ -0,0 +1,16 @@
+// 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.
+
+// Patch file for dart:core classes.
+
+// Patch for Object implementation.
+patch class Object {
+  patch String toString() {
+    return Primitives.objectToString(this);
+  }
+
+  patch void noSuchMethod(String name, List args) {
+    throw new NoSuchMethodException(this, name, args);
+  }
+}