Extract ArcTermsOfServiceNegotiator implementation.

chrome/browser/chromeos/arc/optin/arc_terms_of_service_negotiator.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_OPTIN_ARC_TERMS_OF_SERVICE_NEGOTIATOR_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_OPTIN_ARC_TERMS_OF_SERVICE_NEGOTIATOR_H_
+
+#include <memory>
+#include <string>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chrome/browser/chromeos/arc/arc_support_host.h"
+#include "chrome/browser/chromeos/arc/optin/arc_optin_preference_handler_observer.h"
+
+class PrefService;
+
+namespace arc {
+
+class ArcOptInPreferenceHandler;
+
+// Handles the Terms-of-service agreement user action.
+class ArcTermsOfServiceNegotiator : public ArcSupportHost::Observer,
+                                    public ArcOptInPreferenceHandlerObserver {
+ public:
+  ArcTermsOfServiceNegotiator(PrefService* pref_service,
+                              ArcSupportHost* support_host);
+  ~ArcTermsOfServiceNegotiator() override;
+
+  // Shows "Terms of service" page on ARC support Chrome App. Invokes the
+  // |callback| asynchronously with "|agreed| = true" if user agrees it.
+  // Otherwise (e.g., user clicks "Cancel" or closes the window), invokes
+  // |callback| with |agreed| = false.
+  // Deleting this instance cancels the operation, so |callback| will never
+  // be invoked then.
+  using AgreementCallback = base::Callback<void(bool agreed)>;

[Luis Héctor Chávez, 2016/11/29 18:18:12]

same here, s/agreed/accepted/. Maybe also rename AgreementCallback to
NegotiationCallback or something like that.

[hidehiko, 2016/12/01 14:20:09]

Done.

+  void StartNegotiation(const AgreementCallback& callback);
+
+ private:
+  // ArcSupportHost::Observer:
+  void OnWindowClosed() override;
+  void OnTermsAgreed(bool is_metrics_enabled,
+                     bool is_backup_and_restore_enabled,
+                     bool is_location_service_enabled) override;
+  void OnAuthSucceeded(const std::string& auth_code) override;
+  void OnRetryClicked() override;
+  void OnSendFeedbackClicked() override;
+
+  // ArcOptInPreferenceHandlerObserver:
+  void OnMetricsModeChanged(bool enabled, bool managed) override;
+  void OnBackupAndRestoreModeChanged(bool enabled, bool managed) override;
+  void OnLocationServicesModeChanged(bool enabled, bool managed) override;
+
+  PrefService* const pref_service_;
+  // Owned by ArcSessionManager.
+  ArcSupportHost* const support_host_;
+
+  AgreementCallback callback_;
+  std::unique_ptr<ArcOptInPreferenceHandler> preference_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcTermsOfServiceNegotiator);
+};
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_OPTIN_ARC_TERMS_OF_SERVICE_NEGOTIATOR_H_