arc: ARC loading progress should not be shown when started from OOBE.

chrome/browser/chromeos/arc/arc_session_manager.h

Index: chrome/browser/chromeos/arc/arc_session_manager.h
diff --git a/chrome/browser/chromeos/arc/arc_session_manager.h b/chrome/browser/chromeos/arc/arc_session_manager.h
index a38194a5619ca597ba15cf7d6a606bb7d937f61c..7984d7429872b35ccfd3b11c671886d2410f3b3a 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager.h
+++ b/chrome/browser/chromeos/arc/arc_session_manager.h
@@ -121,6 +121,9 @@ class ArcSessionManager : public ArcSessionObserver,
 
   static ArcSessionManager* Get();
 
+  // Exposed here for unit_tests validation.
+  static bool IsOobeOptInActive();
+
   // It is called from chrome/browser/prefs/browser_prefs.cc.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);