Move session service and supervised users to buildflags.

chrome/browser/sync/supervised_user_signin_manager_wrapper.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/sync/supervised_user_signin_manager_wrapper.h"
 
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/features.h"
 #include "components/signin/core/browser/signin_manager_base.h"
 #include "google_apis/gaia/gaia_constants.h"
 
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
 #include "chrome/browser/supervised_user/supervised_user_constants.h"
 #endif
 
 SupervisedUserSigninManagerWrapper::SupervisedUserSigninManagerWrapper(
     Profile* profile,
     SigninManagerBase* original)
     : SigninManagerWrapper(original), profile_(profile) {}
 
 SupervisedUserSigninManagerWrapper::~SupervisedUserSigninManagerWrapper() {}
 
 std::string SupervisedUserSigninManagerWrapper::GetEffectiveUsername() const {
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
   if (profile_->IsLegacySupervised())
     return supervised_users::kSupervisedUserPseudoEmail;
 #endif
   return SigninManagerWrapper::GetEffectiveUsername();
 }
 
 std::string SupervisedUserSigninManagerWrapper::GetAccountIdToUse() const {
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
   if (profile_->IsLegacySupervised())
     return supervised_users::kSupervisedUserPseudoEmail;
 #endif
   return SigninManagerWrapper::GetAccountIdToUse();
 }
 
 std::string SupervisedUserSigninManagerWrapper::GetSyncScopeToUse() const {
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
   if (profile_->IsLegacySupervised())
     return GaiaConstants::kChromeSyncSupervisedOAuth2Scope;
 #endif
   return SigninManagerWrapper::GetSyncScopeToUse();
 }