Use a single views::MenuConfig instance for each platform

ui/views/controls/menu/menu_config_linux.cc

Index: ui/views/controls/menu/menu_config_linux.cc
diff --git a/ui/views/controls/menu/menu_config_linux.cc b/ui/views/controls/menu/menu_config_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c76ac686b478da3651d242e94bd33ab354d29635
--- /dev/null
+++ b/ui/views/controls/menu/menu_config_linux.cc
@@ -0,0 +1,15 @@
+// Copyright 2015 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/views/controls/menu/menu_config.h"
+
+namespace views {
+
+void MenuConfig::Init() {
+  // Desktop Linux uses the config provided by data member initializers.
+  // Note this causes --open-ash on Linux to use the Desktop Linux style as
+  // well.
+}
+
+}  // namespace views