mustash: Use ui::chromeos::EventRewriter in mus

services/ui/ws/display_manager.h

Index: services/ui/ws/display_manager.h
diff --git a/services/ui/ws/display_manager.h b/services/ui/ws/display_manager.h
index 0f240258379227d88c12d43f3be6bebd318b60b8..904ed4d32179042e5905589b8121692e90151ffb 100644
--- a/services/ui/ws/display_manager.h
+++ b/services/ui/ws/display_manager.h
@@ -17,6 +17,7 @@
 #include "ui/display/display.h"
 
 namespace ui {
+class EventRewriter;
 namespace ws {
 
 class CursorLocationManager;
@@ -97,6 +98,9 @@ class DisplayManager : public UserIdTrackerObserver,
   WindowServer* window_server_;
   UserIdTracker* user_id_tracker_;
 
+  // For rewriting ChromeOS function keys.
+  std::unique_ptr<ui::EventRewriter> event_rewriter_;
+
   // Displays are initially added to |pending_displays_|. When the display is
   // initialized it is moved to |displays_|. WindowServer owns the Displays.
   std::set<Display*> pending_displays_;