Public Sessions: fetch device robot api token during enterprise enrollment.

chrome/browser/policy/cloud/enterprise_metrics.h

 // Copyright (c) 2012 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_POLICY_CLOUD_ENTERPRISE_METRICS_H_
 #define CHROME_BROWSER_POLICY_CLOUD_ENTERPRISE_METRICS_H_
 
 namespace policy {
 
 // Metrics collected for enterprise events.
@@ skipping 134 matching lines @@
   kMetricEnrollmentAutoEnrollmentNotSupported,
   // The lockbox initialization has taken too long to complete and the
   // enrollment has been canceled because of that.
   kMetricLockboxTimeoutError,
   // The username used to re-enroll the device does not belong to the domain
   // that the device was initially enrolled to.
   kMetricEnrollmentWrongUserError,
   // DM server reported that the licenses for the domain has expired or been
   // exhausted.
   kMetricMissingLicensesError,
+  // Enrollment failed because the robot account auth token couldn't be
+  // exchanged for a refresh token.
+  kMetricEnrollmentRobotRefreshTokenFetchFailed,
 
   kMetricEnrollmentSize  // Must be the last.
 };
 
 // Names for the UMA counters. They are shared from here since the events
 // from the same enum above can be triggered in different files, and must use
 // the same UMA histogram name.
 extern const char* kMetricToken;
 extern const char* kMetricPolicy;
 extern const char* kMetricEnrollment;
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_ENTERPRISE_METRICS_H_