Move session service and supervised users to buildflags.

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index b5d7c78318f00ebf4a616f0fc80455b43d50869d..54c7435760ad8f8b2c2f979e57a5fa8abc368398 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -19,6 +19,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_impl_io_data.h"
 #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
+#include "chrome/common/features.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/host_zoom_map.h"
@@ -172,7 +173,7 @@ class ProfileImpl : public Profile {
   // Does final prefs initialization and calls Init().
   void OnLocaleReady();
 
-#if defined(ENABLE_SESSION_SERVICE)
+#if BUILDFLAG(ENABLE_SESSION_SERVICE)
   void StopCreateSessionServiceTimer();
 
   void EnsureSessionServiceCreated();
@@ -236,7 +237,7 @@ class ProfileImpl : public Profile {
   // prefs.
   ExitType last_session_exit_type_;
 
-#if defined(ENABLE_SESSION_SERVICE)
+#if BUILDFLAG(ENABLE_SESSION_SERVICE)
   base::OneShotTimer create_session_service_timer_;
 #endif