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

chrome/browser/chromeos/login/screens/host_pairing_screen.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 CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HOST_PAIRING_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HOST_PAIRING_SCREEN_H_
 
 #include "base/macros.h"
 #include "chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h"
 #include "chrome/browser/chromeos/login/screens/base_screen.h"
@@ skipping 72 matching lines @@
   void OnAnyEnrollmentError();
 
   Delegate* delegate_ = nullptr;
 
   HostPairingScreenView* view_ = nullptr;
 
   // Controller performing pairing. Owned by the wizard controller.
   pairing_chromeos::HostPairingController* remora_controller_ = nullptr;
 
   std::unique_ptr<EnterpriseEnrollmentHelper> enrollment_helper_;
+
+  // Describes the error code of an enrollment operation. For the format, see
+  // the definition of |error_code_| in bluetooth_host_pairing_controller.h.
+  int enrollment_error_code_ = 0;
   std::string enrollment_error_string_;
 
   // Current stage of pairing process.
   Stage current_stage_ = pairing_chromeos::HostPairingController::STAGE_NONE;
 
   base::WeakPtrFactory<HostPairingScreen> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HostPairingScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HOST_PAIRING_SCREEN_H_