Componentize internal class FlagsState in flags_ui component.

chrome/browser/chromeos/login/session/user_session_manager.cc

Index: chrome/browser/chromeos/login/session/user_session_manager.cc
diff --git a/chrome/browser/chromeos/login/session/user_session_manager.cc b/chrome/browser/chromeos/login/session/user_session_manager.cc
index f06ccea8c5cb506b6e4b18be9fecf91d6a2d154d..5958dc6a945bf35cbe4be0c9a5dc141519829a2b 100644
--- a/chrome/browser/chromeos/login/session/user_session_manager.cc
+++ b/chrome/browser/chromeos/login/session/user_session_manager.cc
@@ -242,7 +242,7 @@ base::CommandLine CreatePerSessionCommandLine(Profile* profile) {
   base::CommandLine user_flags(base::CommandLine::NO_PROGRAM);
   flags_ui::PrefServiceFlagsStorage flags_storage_(profile->GetPrefs());
   about_flags::ConvertFlagsToSwitches(&flags_storage_, &user_flags,
-                                      about_flags::kAddSentinels);
+                                      flags_ui::kAddSentinels);
   return user_flags;
 }