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

services/ui/ws/platform_display_default.h

Index: services/ui/ws/platform_display_default.h
diff --git a/services/ui/ws/platform_display_default.h b/services/ui/ws/platform_display_default.h
index 25f4755df4bd21c1378871c80114aaa1bffdc22d..f659136435cfed6c00f507ed099a17dc67c3f559 100644
--- a/services/ui/ws/platform_display_default.h
+++ b/services/ui/ws/platform_display_default.h
@@ -17,6 +17,7 @@
 
 namespace ui {
 
+class EventSink;
 class ImageCursors;
 class LocatedEvent;
 class PlatformWindow;
@@ -32,6 +33,9 @@ class PlatformDisplayDefault : public PlatformDisplay,
                          const display::ViewportMetrics& metrics);
   ~PlatformDisplayDefault() override;
 
+  // EventSource::
+  EventSink* GetEventSink() override;
+
   // PlatformDisplay:
   void Init(PlatformDisplayDelegate* delegate) override;
   void SetViewportSize(const gfx::Size& size) override;