Move some basic early process init into Service Manager

services/service_manager/embedder/main.h

+// Copyright 2017 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 SERVICES_SERVICE_MANAGER_EMBEDDER_MAIN_H_
+#define SERVICES_SERVICE_MANAGER_EMBEDDER_MAIN_H_
+
+#include "build/build_config.h"
+#include "services/service_manager/embedder/service_manager_embedder_export.h"
+
+namespace service_manager {
+
+class MainDelegate;
+
+struct SERVICE_MANAGER_EMBEDDER_EXPORT MainParams {
+  explicit MainParams(MainDelegate* delegate);
+  ~MainParams();
+
+  MainDelegate* const delegate;
+
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+  int argc = 0;
+  const char** argv = nullptr;
+#endif
+};
+
+// Main function which should be called as early as possible by any executable
+// embedding the service manager.
+int SERVICE_MANAGER_EMBEDDER_EXPORT Main(const MainParams& params);
+
+}  // namespace service_manager
+
+#endif  // SERVICES_SERVICE_MANAGER_EMBEDDER_MAIN_H_