Introduce mash/shell

mash/shell/main.cc

Index: mash/shell/main.cc
diff --git a/mash/shell/main.cc b/mash/shell/main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1e257b8bcd9e14c5dca884316ffd8acae3e8c6d0
--- /dev/null
+++ b/mash/shell/main.cc
@@ -0,0 +1,12 @@
+// 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 "mash/shell/shell_application_delegate.h"
+#include "mojo/application/public/cpp/application_runner.h"
+#include "mojo/public/c/system/main.h"
+
+MojoResult MojoMain(MojoHandle shell_handle) {
+  mojo::ApplicationRunner runner(new mash::shell::ShellApplicationDelegate);
+  return runner.Run(shell_handle);
+}