Move session service and supervised users to buildflags.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index a5e0d6c230647f8dbb4de909abb458cb898434a5..19646787be9606ba0fd779951ef39ee6fa95e807 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -121,7 +121,7 @@
 #include "extensions/common/constants.h"
 #endif
 
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
 #include "chrome/browser/supervised_user/supervised_user_service.h"
 #include "chrome/browser/supervised_user/supervised_user_service_factory.h"
 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
@@ -433,7 +433,7 @@ void ProfileIOData::InitializeOnUIThread(Profile* profile) {
 
   params->proxy_config_service = ProxyServiceFactory::CreateProxyConfigService(
       profile->GetProxyConfigTracker());
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
   SupervisedUserService* supervised_user_service =
       SupervisedUserServiceFactory::GetForProfile(profile);
   params->supervised_user_url_filter =
@@ -1098,7 +1098,7 @@ void ProfileIOData::Init(
         profile_params_->resource_prefetch_predictor_observer_.release());
   }
 
-#if defined(ENABLE_SUPERVISED_USERS)
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
   supervised_user_url_filter_ = profile_params_->supervised_user_url_filter;
 #endif