kiosk: UMA for launch error

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"
 #include "chromeos/chromeos_export.h"
 #include "google_apis/gaia/gaia_auth_consumer.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "net/base/net_errors.h"
 
 namespace chromeos {
 
 class UserContext;
 
 class CHROMEOS_EXPORT AuthFailure {
  public:
+  // Enum used for UMA. Do NOT reorder or remove entry. Don't forget to
+  // update histograms.xml when adding new entries.
   enum FailureReason {
-    NONE,
-    COULD_NOT_MOUNT_CRYPTOHOME,
-    COULD_NOT_MOUNT_TMPFS,
-    COULD_NOT_UNMOUNT_CRYPTOHOME,
-    DATA_REMOVAL_FAILED,  // Could not destroy your old data
-    LOGIN_TIMED_OUT,
-    UNLOCK_FAILED,
-    NETWORK_AUTH_FAILED,     // Could not authenticate against Google
-    OWNER_REQUIRED,          // Only the device owner can log-in.
-    WHITELIST_CHECK_FAILED,  // Login attempt blocked by whitelist. This
+    NONE = 0,
+    COULD_NOT_MOUNT_CRYPTOHOME = 1,
+    COULD_NOT_MOUNT_TMPFS = 2,
+    COULD_NOT_UNMOUNT_CRYPTOHOME = 3,
+    DATA_REMOVAL_FAILED = 4,  // Could not destroy your old data
+    LOGIN_TIMED_OUT = 5,
+    UNLOCK_FAILED = 6,
+    NETWORK_AUTH_FAILED = 7,     // Could not authenticate against Google
+    OWNER_REQUIRED = 8,          // Only the device owner can log-in.
+    WHITELIST_CHECK_FAILED = 9,  // Login attempt blocked by whitelist. This
     // value is synthesized by the ExistingUserController and passed to the
     // login_status_consumer_ in tests only. It is never generated or seen by
     // any of the other authenticator classes.
-    TPM_ERROR,                   // Critical TPM error encountered.
-    USERNAME_HASH_FAILED,        // Could not get username hash.
-    FAILED_TO_INITIALIZE_TOKEN,  // Could not get OAuth2 Token,
-    NUM_FAILURE_REASONS,         // This has to be the last item.
+    TPM_ERROR = 10,                   // Critical TPM error encountered.
+    USERNAME_HASH_FAILED = 11,        // Could not get username hash.
+    FAILED_TO_INITIALIZE_TOKEN = 12,  // Could not get OAuth2 Token,
+    NUM_FAILURE_REASONS,              // This has to be the last item.
   };
 
   explicit AuthFailure(FailureReason reason)
       : reason_(reason), error_(GoogleServiceAuthError::NONE) {
     DCHECK(reason != NETWORK_AUTH_FAILED);
   }
 
   inline bool operator==(const AuthFailure& b) const {
     if (reason_ != b.reason_) {
       return false;
@@ skipping 66 matching lines @@
   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();
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_