Adds ability for chrome to behave as mojo_runner

chrome/app/mash/mash_runner.h

Index: chrome/app/mash/mash_runner.h
diff --git a/chrome/app/mash/mash_runner.h b/chrome/app/mash/mash_runner.h
new file mode 100644
index 0000000000000000000000000000000000000000..0658077c1473df22485ecd7ae4d7ad457c0c629f
--- /dev/null
+++ b/chrome/app/mash/mash_runner.h
@@ -0,0 +1,39 @@
+// 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.
+
+#ifndef CHROME_APP_MASH_MASH_RUNNER_H_
+#define CHROME_APP_MASH_MASH_RUNNER_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "mojo/shell/public/interfaces/shell_client.mojom.h"
+
+namespace mojo {
+class ShellClient;
+class ShellConnection;
+}
+
+// Responsible for running mash, both child and main processes.
+class MashRunner {
+ public:
+  MashRunner();
+  ~MashRunner();
+
+  void Run();
+
+ private:
+  void RunMain();
+  void RunChild();
+
+  void StartChildApp(mojo::shell::mojom::ShellClientRequest client_request);
+
+  scoped_ptr<mojo::ShellClient> shell_client_;
+  scoped_ptr<mojo::ShellConnection> shell_connection_;
+
+  DISALLOW_COPY_AND_ASSIGN(MashRunner);
+};
+
+int MashMain();
+
+#endif  // CHROME_APP_MASH_MASH_RUNNER_H_