Refactor ArcBridgeService detection and initialization to a separate class ArcServiceLauncher.

chrome/browser/chromeos/arc/arc_service_launcher.cc

+// Copyright 2016 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 "chrome/browser/chromeos/arc/arc_service_launcher.h"
+
+#include "base/bind.h"
+#include "chrome/browser/chromeos/arc/arc_auth_service.h"
+#include "chrome/browser/chromeos/arc/arc_intent_helper_bridge.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/session_manager_client.h"
+#include "components/arc/arc_bridge_service.h"
+
+namespace arc {
+
+ArcServiceLauncher::ArcServiceLauncher() : weak_factory_(this) {}
+
+ArcServiceLauncher::~ArcServiceLauncher() {}
+
+void ArcServiceLauncher::Initialize() {
+  // Create ARC service manager.
+  arc_service_manager_.reset(new ArcServiceManager());
+  arc_service_manager_->AddService(make_scoped_ptr(
+      new ArcAuthService(arc_service_manager_->arc_bridge_service())));
+  arc_service_manager_->AddService(make_scoped_ptr(
+      new ArcIntentHelperBridge(arc_service_manager_->arc_bridge_service())));
+
+  // Detect availiability.
+  chromeos::SessionManagerClient* session_manager_client =
+      chromeos::DBusThreadManager::Get()->GetSessionManagerClient();
+  session_manager_client->CheckArcAvailability(base::Bind(
+      &ArcServiceLauncher::OnArcAvailable, weak_factory_.GetWeakPtr()));
+}
+
+void ArcServiceLauncher::Shutdown() {
+  DCHECK(arc_service_manager_);
+  arc_service_manager_->arc_bridge_service()->Shutdown();
+}
+
+void ArcServiceLauncher::OnArcAvailable(bool arc_available) {
+  arc_service_manager_->arc_bridge_service()->SetDetectedAvailability(
+      arc_available);
+}
+
+}  // namespace arc