Get frecon working with mustash.

services/ui/display/screen_manager_ozone.h

Index: services/ui/display/screen_manager_ozone.h
diff --git a/services/ui/display/screen_manager_ozone.h b/services/ui/display/screen_manager_ozone.h
index a0d6aaaf7b90ae7b4122b9eaa1b2b0c5ba6d363e..013607672e0309f895e502bc975a355a2a7d43f2 100644
--- a/services/ui/display/screen_manager_ozone.h
+++ b/services/ui/display/screen_manager_ozone.h
@@ -66,6 +66,9 @@ class ScreenManagerOzone
   void SetDisplayWorkArea(int64_t display_id,
                           const gfx::Size& size,
                           const gfx::Insets& insets) override;
+  void TakeDisplayControl(const TakeDisplayControlCallback& callback) override;
+  void RelinquishDisplayControl(
+      const RelinquishDisplayControlCallback& callback) override;
 
  private:
   friend class ScreenManagerOzoneTest;