chromeos: Avoid bogus child account warning at startup.

chrome/browser/supervised_user/child_accounts/child_account_service.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/supervised_user/child_accounts/child_account_service.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
@@ skipping 278 matching lines @@
 
 void ChildAccountService::ScheduleNextFamilyInfoUpdate(base::TimeDelta delay) {
   family_fetch_timer_.Start(
       FROM_HERE, delay, this, &ChildAccountService::StartFetchingFamilyInfo);
 }
 
 void ChildAccountService::PropagateChildStatusToUser(bool is_child) {
 #if defined(OS_CHROMEOS)
   user_manager::User* user =
       chromeos::ProfileHelper::Get()->GetUserByProfile(profile_);
-  if (user) {
+  if (user)
     user_manager::UserManager::Get()->ChangeUserChildStatus(user, is_child);
-  } else {
-    LOG(WARNING) <<
-        "User instance wasn't found while setting child account flag.";
-  }
+  else if (!chromeos::ProfileHelper::Get()->IsSigninProfile(profile_))
+    LOG(DFATAL) << "User instance not found while setting child account flag.";
 #endif
 }
 
 void ChildAccountService::SetFirstCustodianPrefs(
     const FamilyInfoFetcher::FamilyMember& custodian) {
   profile_->GetPrefs()->SetString(prefs::kSupervisedUserCustodianName,
                                   custodian.display_name);
   profile_->GetPrefs()->SetString(prefs::kSupervisedUserCustodianEmail,
                                   custodian.email);
   profile_->GetPrefs()->SetString(prefs::kSupervisedUserCustodianProfileURL,
@@ skipping 26 matching lines @@
 }
 
 void ChildAccountService::ClearSecondCustodianPrefs() {
   profile_->GetPrefs()->ClearPref(prefs::kSupervisedUserSecondCustodianName);
   profile_->GetPrefs()->ClearPref(prefs::kSupervisedUserSecondCustodianEmail);
   profile_->GetPrefs()->ClearPref(
       prefs::kSupervisedUserSecondCustodianProfileURL);
   profile_->GetPrefs()->ClearPref(
       prefs::kSupervisedUserSecondCustodianProfileImageURL);
 }