Turn ArcSupportHost from Observer model to Delegate

chrome/browser/chromeos/arc/arc_session_manager.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_ARC_SESSION_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_SESSION_MANAGER_H_
 
 #include <memory>
 #include <ostream>
 #include <string>
@@ skipping 17 matching lines @@
 namespace arc {
 
 class ArcAndroidManagementChecker;
 class ArcAuthContext;
 class ArcTermsOfServiceNegotiator;
 enum class ProvisioningResult : int;
 
 // This class proxies the request from the client to fetch an auth code from
 // LSO. It lives on the UI thread.
 class ArcSessionManager : public ArcSessionRunner::Observer,
-                          public ArcSupportHost::Observer {
+                          public ArcSupportHost::ErrorDelegate {
  public:
   // Represents each State of ARC session.
   // NOT_INITIALIZED: represents the state that the Profile is not yet ready
   //   so that this service is not yet initialized, or Chrome is being shut
   //   down so that this is destroyed.
   // STOPPED: ARC session is not running, or being terminated.
   // NEGOTIATING_TERMS_OF_SERVICE: Negotiating Google Play Store "Terms of
   //   Service" with a user. There are several ways for the negotiation,
   //   including opt-in flow, which shows "Terms of Service" page on ARC
   //   support app, and OOBE flow, which shows "Terms of Service" page as a
@@ skipping 138 matching lines @@
   // If ARC is stopped, triggers to remove the data. Otherwise, queues to
   // remove the data after ARC stops.
   // A log statement with the removal reason must be added prior to calling
   // this.
   void RequestArcDataRemoval();
 
   // Called from the Chrome OS metrics provider to record Arc.State
   // periodically.
   void RecordArcState();
 
-  // ArcSupportHost::Observer:
+  // ArcSupportHost:::ErrorDelegate:
   void OnWindowClosed() override;
-  void OnTermsAgreed(bool is_metrics_enabled,
-                     bool is_backup_and_restore_enabled,
-                     bool is_location_service_enabled) override;
   void OnRetryClicked() override;
   void OnSendFeedbackClicked() override;
 
   // StopArc(), then restart. Between them data clear may happens.
   // This is a special method to support enterprise device lost case.
   // This can be called only when ARC is running.
   void StopAndEnableArc();
 
   ArcSupportHost* support_host() { return support_host_.get(); }
 
@@ skipping 146 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(ArcSessionManager);
 };
 
 // Outputs the stringified |state| to |os|. This is only for logging purposes.
 std::ostream& operator<<(std::ostream& os,
                          const ArcSessionManager::State& state);
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_SESSION_MANAGER_H_