Add initial Controller to DownloadService

components/download/internal/download_service_impl.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 COMPONENTS_DOWNLOAD_INTERNAL_DOWNLOAD_SERVICE_IMPL_H_
 #define COMPONENTS_DOWNLOAD_INTERNAL_DOWNLOAD_SERVICE_IMPL_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "components/download/internal/config.h"
 #include "components/download/public/download_service.h"
 
 namespace download {
 
+class Controller;
+
 struct DownloadParams;
 struct SchedulingParams;
 
 // The internal implementation of the DownloadService.
 class DownloadServiceImpl : public DownloadService {
  public:
-  DownloadServiceImpl(std::unique_ptr<Configuration> config);
+  DownloadServiceImpl(std::unique_ptr<Controller> controller);
   ~DownloadServiceImpl() override;
 
   // DownloadService implementation.
+  ServiceStatus GetStatus() override;
   void StartDownload(const DownloadParams& download_params) override;
   void PauseDownload(const std::string& guid) override;
   void ResumeDownload(const std::string& guid) override;
   void CancelDownload(const std::string& guid) override;
   void ChangeDownloadCriteria(const std::string& guid,
                               const SchedulingParams& params) override;
 
  private:
-  std::unique_ptr<Configuration> config_;
+  std::unique_ptr<Controller> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadServiceImpl);
 };
 
 }  // namespace download
 
 #endif  // COMPONENTS_DOWNLOAD_INTERNAL_DOWNLOAD_SERVICE_IMPL_H_