Bootstrapping: Send meaningful error code/message from Slave to Master

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 33 matching lines @@
     UPDATE_STATUS_UPDATED,
   };
 
   enum EnrollmentStatus {
     ENROLLMENT_STATUS_UNKNOWN,
     ENROLLMENT_STATUS_ENROLLING,
     ENROLLMENT_STATUS_FAILURE,
     ENROLLMENT_STATUS_SUCCESS,
   };
 
+  enum class ErrorCode : int {
+    ERROR_NONE = 0,
+    NETWORK_ERROR,
+    AUTH_ERROR,
+    ENROLL_ERROR,
+    OTHER_ERROR,
+  };
+
   class Observer {
    public:
     Observer();
     virtual ~Observer();
 
     // Called when pairing has moved on from one stage to another.
     virtual void PairingStageChanged(Stage new_stage) = 0;
 
     // Called when the controller has sent a configuration to apply.
     virtual void ConfigureHostRequested(bool accepted_eula,
@@ skipping 44 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;
 
+  virtual void SetErrorCodeAndMessage(int error_code,
+                                      const std::string& error_message) = 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_