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 7f464b0ebcaad99419e67bd1de54f2eed03d43fe..e96f78b1b8d061fc2ed23b579edde94d7589912e 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;
@@ -100,6 +101,9 @@ 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_;