Primary display change notifications.

ui/views/mus/screen_mus.h

Index: ui/views/mus/screen_mus.h
diff --git a/ui/views/mus/screen_mus.h b/ui/views/mus/screen_mus.h
index 9866d0ae0a1ded3b5d36dd39d46c7184676f5f8e..2c3a9a871434f1368728a7e192719eb439f915d4 100644
--- a/ui/views/mus/screen_mus.h
+++ b/ui/views/mus/screen_mus.h
@@ -6,7 +6,7 @@
 #define UI_VIEWS_MUS_SCREEN_MUS_H_
 
 #include "mojo/public/cpp/bindings/binding.h"
-#include "services/ui/public/interfaces/display.mojom.h"
+#include "services/ui/public/interfaces/display_manager.mojom.h"
 #include "ui/display/screen_base.h"
 #include "ui/views/mus/mus_export.h"
 
@@ -36,10 +36,13 @@ class VIEWS_MUS_EXPORT ScreenMus
   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
 
   // ui::mojom::DisplayManager:
-  void OnDisplays(mojo::Array<ui::mojom::WsDisplayPtr> ws_displays) override;
+  void OnDisplays(mojo::Array<ui::mojom::WsDisplayPtr> ws_displays,
+                  int64_t primary_display_id,
+                  int64_t internal_display_id) override;
   void OnDisplaysChanged(
       mojo::Array<ui::mojom::WsDisplayPtr> ws_displays) override;
-  void OnDisplayRemoved(int64_t id) override;
+  void OnDisplayRemoved(int64_t display_id) override;
+  void OnPrimaryDisplayChanged(int64_t primary_display_id) override;
 
   ScreenMusDelegate* delegate_;  // Can be nullptr.
   ui::mojom::DisplayManagerPtr display_manager_;