Move mojo/runner to mojo/shell/standalone

mojo/runner/desktop/main_helper.h

-// 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.
-
-#ifndef MOJO_RUNNER_DESKTOP_MAIN_HELPER_H
-#define MOJO_RUNNER_DESKTOP_MAIN_HELPER_H
-
-#include "base/callback.h"
-#include "url/gurl.h"
-
-namespace mojo {
-namespace runner {
-
-// Helper method to start Mojo Runner code.
-// If |mojo_url| is not empty, the given mojo application is started. Otherwise,
-// an application must have been specified on the command line and it is run.
-// |callback| is only called in the later case.
-int RunnerMain(int argc, char** argv,
-               const GURL& mojo_url,
-               const base::Closure& callback);
-
-}  // namespace runner
-}  // namespace mojo
-
-#endif  // MOJO_RUNNER_DESKTOP_MAIN_HELPER_H