mojo: first take on removing mojo_main_{chromium,standalone}.

mojo/public/cpp/application/application_runner.h

+// Copyright 2014 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 MOJO_PUBLIC_APPLICATION_APPLICATION_RUNNER_H_
+#define MOJO_PUBLIC_APPLICATION_APPLICATION_RUNNER_H_
+
+#include "mojo/public/cpp/system/core.h"
+
+namespace mojo {
+
+class ApplicationDelegate;
+
+// A utility for running an Application. The typical use case is to use
+// when writing your MojoMain:
+//
+//  MojoResult MojoMain(MojoHandle shell_handle) {
+//    mojo::ApplicationRunner runner(new MyApplicationDelegate());
+//    return runner.Run(shell_handle);
+//  }
+//
+// ApplicationRunner takes care of mojo environment initialization and
+// shutdown, and starting a RunLoop from which your application can run and
+// ultimately Quit().
+class ApplicationRunner {
+ public:
+  // Takes ownership of |delegate|.
+  explicit ApplicationRunner(ApplicationDelegate* delegate);
+  ~ApplicationRunner();
+
+  // Once the various parameters have been set above, use Run to initialize an
+  // ApplicationImpl wired to the provided delegate, and run a RunLoop until
+  // the application exits.
+  MojoResult Run(MojoHandle shell_handle);
+
+ private:
+  ApplicationDelegate* delegate_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(ApplicationRunner);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_APPLICATION_APPLICATION_RUNNER_H_