Add the beginning of a simple window manager that we'll support on Windows.

mash/wm/main.cc

Index: mash/wm/main.cc
diff --git a/mash/wm/main.cc b/mash/wm/main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e3c08198e2834ad729866adbd0851dc5820b7f1b
--- /dev/null
+++ b/mash/wm/main.cc
@@ -0,0 +1,12 @@
+// Copyright 2016 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 "mash/wm/wm.h"
+#include "services/service_manager/public/c/main.h"
+#include "services/service_manager/public/cpp/service_runner.h"
+
+MojoResult ServiceMain(MojoHandle service_request_handle) {
+  service_manager::ServiceRunner runner(new mash::wm::WM);
+  return runner.Run(service_request_handle);
+}