Move some basic early process init into Service Manager

services/service_manager/public/cpp/shared_file_util.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_PUBLIC_CPP_SHARED_FILE_UTIL_H_
-#define SERVICES_SERVICE_MANAGER_PUBLIC_CPP_SHARED_FILE_UTIL_H_
-
-#include <map>
-#include <string>
-
-#include "base/command_line.h"
-#include "base/optional.h"
-
-namespace service_manager {
-
-class SharedFileSwitchValueBuilder final {
- public:
-  void AddEntry(const std::string& key_str, int key_id);
-  const std::string& switch_value() const { return switch_value_; }
-
- private:
-  std::string switch_value_;
-};
-
-base::Optional<std::map<int, std::string>> ParseSharedFileSwitchValue(
-    const std::string& value);
-
-}  // namespace service_manager
-
-#endif  // SERVICES_SERVICE_MANAGER_PUBLIC_CPP_SHARED_FILE_UTIL_H_