arc-bridge: Introduce the ArcService class

chrome/browser/chromeos/arc/arc_auth_service.cc

+// Copyright 2015 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_auth_service.h"
+
+#include <utility>
+
+namespace arc {
+
+ArcAuthService::ArcAuthService(ArcBridgeService* arc_bridge_service)
+    : arc_bridge_service_(arc_bridge_service), binding_(this) {
+  DCHECK(arc_bridge_service_);
+  arc_bridge_service_->AddObserver(this);
+
+  // If AuthInstance was ready before we AddObserver(), we won't get
+  // OnAuthInstanceReady events. For such case, we have to call it explicitly.
+  if (arc_bridge_service_->auth_instance())
+    OnAuthInstanceReady();
+}
+
+ArcAuthService::~ArcAuthService() {
+  arc_bridge_service_->RemoveObserver(this);
+}
+
+void ArcAuthService::OnAuthInstanceReady() {
+  arc::AuthHostPtr host;
+  binding_.Bind(GetProxy(&host));
+  arc_bridge_service_->auth_instance()->Init(std::move(host));
+}
+
+void ArcAuthService::GetAuthCode(const GetAuthCodeCallback& callback) {
+  // TODO(victorhsieh): request auth code from LSO (crbug.com/571146).
+  callback.Run(mojo::String("fake auth code from ArcAuthService in Chrome"));
+}
+
+}  // namespace arc