Add initial Controller to DownloadService

components/download/internal/startup_status.cc

+// 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.
+
+#include "components/download/internal/startup_status.h"
+
+namespace download {
+
+StartupStatus::StartupStatus() = default;
+StartupStatus::~StartupStatus() = default;
+
+bool StartupStatus::Complete() const {
+  return driver_ok.has_value() && model_ok.has_value();
+}
+
+bool StartupStatus::Ok() const {
+  DCHECK(Complete());
+  return driver_ok.value() && model_ok.value();
+}
+
+}  // namespace download