Report Login.SuccessReason in LoginPerformer

chromeos/login/auth/auth_status_consumer.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 CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_
 #define CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_
 
 #include <string>
 
 #include "base/logging.h"
@@ skipping 87 matching lines @@
   const FailureReason& reason() const { return reason_; }
 
  private:
   AuthFailure(FailureReason reason, GoogleServiceAuthError error)
       : reason_(reason), error_(error) {}
 
   FailureReason reason_;
   GoogleServiceAuthError error_;
 };
 
+// Enum used for UMA. Do NOT reorder or remove entry. Don't forget to
+// update histograms.xml when adding new entries.
+enum SuccessReason {
+  OFFLINE_AND_ONLINE = 0,
+  OFFLINE_ONLY = 1,
+  NUM_SUCCESS_REASONS,  // This has to be the last item.
+};
+
 // An interface that defines the callbacks for objects that the
 // Authenticator class will call to report the success/failure of
 // authentication for Chromium OS.
 class CHROMEOS_EXPORT AuthStatusConsumer {
  public:
   virtual ~AuthStatusConsumer() {}
   // The current login attempt has ended in failure, with error |error|.
   virtual void OnAuthFailure(const AuthFailure& error) = 0;
 
   // The current login attempt has succeeded for |user_context|.
   virtual void OnAuthSuccess(const UserContext& user_context) = 0;
   // The current guest login attempt has succeeded.
   virtual void OnOffTheRecordAuthSuccess() {}
   // The same password didn't work both online and offline.
   virtual void OnPasswordChangeDetected();
   // The cryptohome is encrypted in old format and needs migration.
   virtual void OnOldEncryptionDetected(const UserContext& user_context,
                                        bool has_incomplete_migration);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_