Add UI components for license type selection in ChromeOS login UI.

components/policy/core/common/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 COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_
 
 #include "components/policy/policy_export.h"
 
 namespace policy {
@@ skipping 211 matching lines @@
   // A registration certificate could not be fetched from the PCA.
   kMetricEnrollmentRegistrationCertificateFetchFailed = 52,
   // The request to enroll could not be signed.
   kMetricEnrollmentRegisterCannotSignRequest = 53,
   // Device model or serial number missing from VPD.
   kMetricEnrollmentNoDeviceIdentification = 54,
   // Active Directory policy fetch failed.
   kMetricEnrollmentActiveDirectoryPolicyFetchFailed = 55,
   // Failed to store DM token into the local state.
   kMetricEnrollmentStoreDMTokenFailed = 56,
+  // Failed to get available licenses.
+  kEnrollmentLicenseRequestFailed = 57,

[emaxx, 2017/07/07 14:32:34]

nit: s/kEnrollmentLicenseRequestFailed/kMetricEnrollmentLicenseRequestFailed/
(following the style of the previous 56 items of the enum)

[Denis Kuznetsov (DE-MUC), 2017/07/13 18:44:03]

Done.

 };
 
 // Events related to policy refresh.
 // This enum is used to define the buckets for an enumerated UMA histogram.
 // Hence,
 //   (a) existing enumerated constants should never be deleted or reordered, and
 //   (b) new constants should only be appended at the end of the enumeration.
 enum MetricPolicyRefresh {
   // A refresh occurred while the policy was not invalidated and the policy was
   // changed. Invalidations were enabled.
@@ skipping 38 matching lines @@
 POLICY_EXPORT extern const char kMetricToken[];
 POLICY_EXPORT extern const char kMetricPolicy[];
 POLICY_EXPORT extern const char kMetricUserPolicyRefresh[];
 POLICY_EXPORT extern const char kMetricUserPolicyInvalidations[];
 POLICY_EXPORT extern const char kMetricDevicePolicyRefresh[];
 POLICY_EXPORT extern const char kMetricDevicePolicyInvalidations[];
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_