Revert of Move some basic early process init into Service Manager

services/service_manager/embedder/main_delegate.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_DELEGATE_H_
-#define SERVICES_SERVICE_MANAGER_EMBEDDER_MAIN_DELEGATE_H_
-
-#include "services/service_manager/embedder/service_manager_embedder_export.h"
-
-namespace base {
-namespace mac {
-class ScopedNSAutoreleasePool;
-}
-}
-
-namespace service_manager {
-
-// An interface which must be implemented by Service Manager embedders to
-// control basic process initialization and shutdown, as well as early branching
-// to run specific types of subprocesses.
-class MainDelegate {
- public:
-  // Extra parameters passed to MainDelegate::Initialize.
-  struct InitializeParams {
-#if defined(OS_MACOSX)
-    // The outermost autorelease pool, allocated by internal service manager
-    // logic. This is guaranteed to live throughout the extent of Run().
-    base::mac::ScopedNSAutoreleasePool* autorelease_pool = nullptr;
-#endif
-  };
-
-  virtual ~MainDelegate() {}
-
-  // Perform early process initialization. Returns -1 if successful, or the exit
-  // code with which the process should be terminated due to initialization
-  // failure.
-  virtual int Initialize(const InitializeParams& params) = 0;
-
-  // Runs the main process logic. Called exactly once, and only after a
-  // successful call to Initialize(). Returns the exit code to use when
-  // terminating the process after Run() (and then ShutDown()) completes.
-  virtual int Run() = 0;
-
-  // Called after Run() returns, before exiting the process.
-  virtual void ShutDown() = 0;
-};
-
-}  // namespace service_manager
-
-#endif  // SERVICES_SERVICE_MANAGER_EMBEDDER_MAIN_DELEGATE_H_