arc: Restore UMA statistics for failures in LSO flow.

chrome/browser/chromeos/arc/arc_support_host.h

 // Copyright 2016 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_ARC_ARC_SUPPORT_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_SUPPORT_HOST_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 41 matching lines @@
     virtual void OnWindowClosed() {}
 
     // Called when the user press AGREE button on ToS page.
     virtual void OnTermsAgreed(bool is_metrics_enabled,
                                bool is_backup_and_restore_enabled,
                                bool is_location_service_enabled) {}
 
     // Called when LSO auth token fetch is successfully completed.
     virtual void OnAuthSucceeded(const std::string& auth_code) {}
 
+    // Called when LSO auth token fetch has failed.
+    virtual void OnAuthFailed() {}
+
     // Called when "RETRY" button on the error page is clicked.
     virtual void OnRetryClicked() {}
 
     // Called when send feedback button on error page is clicked.
     virtual void OnSendFeedbackClicked() {}
   };
 
   static const char kHostAppId[];
   static const char kStorageId[];
 
@@ skipping 111 matching lines @@
   bool is_arc_managed_ = false;
 
   PreferenceCheckboxData metrics_checkbox_;
   PreferenceCheckboxData backup_and_restore_checkbox_;
   PreferenceCheckboxData location_services_checkbox_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcSupportHost);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_SUPPORT_HOST_H_