[Merge to M50] Reset BluetoothHostPairingController in an earlier stage for normal user login flow.

components/pairing/host_pairing_controller.h

 // Copyright 2014 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 COMPONENTS_PAIRING_HOST_PAIRING_CONTROLLER_H_
 #define COMPONENTS_PAIRING_HOST_PAIRING_CONTROLLER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 93 matching lines @@
   virtual void OnUpdateStatusChanged(UpdateStatus update_status) = 0;
 
   // Notify that enrollment status has changed.
   // Can be called on stage |STAGE_WAITING_FOR_CREDENTIALS|.
   virtual void OnEnrollmentStatusChanged(
       EnrollmentStatus enrollment_status) = 0;
 
   // Set the permanent id assigned during enrollment.
   virtual void SetPermanentId(const std::string& permanent_id) = 0;
 
+  // Reset the controller.
+  virtual void Reset() = 0;
+
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HostPairingController);
 };
 
 }  // namespace pairing_chromeos
 
 #endif  // COMPONENTS_PAIRING_HOST_PAIRING_CONTROLLER_H_