Removes --disable-ime-mode-indicator flag.

ash/system/ime/ime_observer.h

Index: ash/system/ime/ime_observer.h
diff --git a/ash/system/ime/ime_observer.h b/ash/system/ime/ime_observer.h
index aee74aea2ba08701e621e1a913a74588067448fc..a7f938c849177c316855c627bd3c1efdf62ebb67 100644
--- a/ash/system/ime/ime_observer.h
+++ b/ash/system/ime/ime_observer.h
@@ -12,9 +12,8 @@ class IMEObserver {
   virtual ~IMEObserver() {}
 
   // Notify the observer that the IME state has changed, and should be
-  // refreshed.  |show_message| indicates whether the user should be alerted of
-  // the change.
-  virtual void OnIMERefresh(bool show_message) = 0;
+  // refreshed.
+  virtual void OnIMERefresh() = 0;
 };
 
 }  // namespace ash