Introduces message_center_switches.(h|cc)

ui/message_center/message_center_switches.cc

Index: ui/message_center/message_center_switches.cc
diff --git a/ui/message_center/message_center_switches.cc b/ui/message_center/message_center_switches.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bce89e9e269a8771be1dc202046e04d977327745
--- /dev/null
+++ b/ui/message_center/message_center_switches.cc
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/message_center/message_center_switches.h"
+
+namespace message_center {
+namespace switches {
+
+const char kEnableNewMessageCenterBubble[] = "enable-new-message-center-bubble";
+
+}  // namespace switches
+}  // namespace message_center