Additional logs for supervised user auth/creation errors.

chrome/browser/chromeos/login/supervised/supervised_user_authenticator.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/supervised/supervised_user_authenticator.h"
 
 #include "base/bind.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
@@ skipping 245 matching lines @@
     state = ResolveCryptohomeFailureState();
 
   DCHECK(current_state_->cryptohome_complete());
   DCHECK(current_state_->hash_obtained() || current_state_->add_key);
   return state;
 }
 
 SupervisedUserAuthenticator::AuthState
     SupervisedUserAuthenticator::ResolveCryptohomeFailureState() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  LOG(ERROR) << "Failed to authenticate supervised user, code: "

[ygorshenin1, 2014/08/14 15:52:32]

nit: s/code/mount error/

[Nikita (slow), 2014/08/14 16:02:05]

Done.

+             << current_state_->cryptohome_code();
   if (current_state_->cryptohome_code() ==
       cryptohome::MOUNT_ERROR_TPM_NEEDS_REBOOT) {
     // Critical TPM error detected, reboot needed.
     return FAILED_TPM;
   }
 
   if (current_state_->cryptohome_code() ==
       cryptohome::MOUNT_ERROR_USER_DOES_NOT_EXIST) {
     // If we tried a mount but the user did not exist, then we should wait
     // for online login to succeed and try again with the "create" flag set.
@@ skipping 59 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return hash_obtained_;
 }
 
 std::string SupervisedUserAuthenticator::AuthAttempt::hash() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return hash_;
 }
 
 }  // namespace chromeos