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

mojo/public/cpp/application/application_runner_chromium.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_CHROMIUM_H_
+#define MOJO_PUBLIC_APPLICATION_APPLICATION_RUNNER_CHROMIUM_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "mojo/public/cpp/system/core.h"
+
+namespace mojo {
+
+class ApplicationDelegate;
+
+// A utility for running a chromium based mojo Application. The typical use
+// case is to use when writing your MojoMain:
+//
+//  MojoResult MojoMain(MojoHandle shell_handle) {
+//    mojo::ApplicationRunnerChromium runner(new MyDelegate());
+//    return runner.Run(shell_handle);
+//  }
+//
+// ApplicationRunnerChromium takes care of chromium environment initialization
+// and shutdown, and starting a RunLoop from which your application can run and
+// ultimately Quit().
+class ApplicationRunnerChromium {
+ public:
+  // Takes ownership of |delegate|.
+  explicit ApplicationRunnerChromium(ApplicationDelegate* delegate);
+  ~ApplicationRunnerChromium();
+
+  void set_message_loop_type(base::MessageLoop::Type type);
+
+  // 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:
+  scoped_ptr<ApplicationDelegate> delegate_;
+
+  // MessageLoop type. TYPE_DEFAULT is default.
+  base::MessageLoop::Type message_loop_type_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(ApplicationRunnerChromium);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_APPLICATION_APPLICATION_RUNNER_CHROMIUM_H_