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 5c6a16e759de31556166ac3b5dbf846a999b6347..6cd5b833d277da151641fac9bf7da9e3d2b01927 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager.h
+++ b/chrome/browser/chromeos/arc/arc_session_manager.h
@@ -209,8 +209,13 @@ class ArcSessionManager : public ArcService,
   void SetAttemptUserExitCallbackForTesting(const base::Closure& callback);
 
  private:
+  enum class NegotiatorType {
+    DEFAULT,
+    OOBE,
+  };
+
   // Negotiates the terms of service to user.
-  void StartTermsOfServiceNegotiation();
+  void StartTermsOfServiceNegotiation(NegotiatorType type);
   void OnTermsOfServiceNegotiated(bool accepted);
 
   void SetState(State state);