Implement a MoveCursorToScreenLocation for just the window manager.

services/ui/public/interfaces/window_manager.mojom

Index: services/ui/public/interfaces/window_manager.mojom
diff --git a/services/ui/public/interfaces/window_manager.mojom b/services/ui/public/interfaces/window_manager.mojom
index 3ddbe2ce6567a53792741d58db14e6e18729dd78..e3896e35e942568b161c21f6fd65ba11db70cdda 100644
--- a/services/ui/public/interfaces/window_manager.mojom
+++ b/services/ui/public/interfaces/window_manager.mojom
@@ -323,6 +323,10 @@ interface WindowManagerClient {
   // clear.
   WmSetGlobalOverrideCursor(CursorData? cursor);
 
+  // Moves the cursor to the given location on the given display.
+  WmMoveCursorToDisplayLocation(gfx.mojom.Point display_pixels,
+                                int64 display_id);
+
   // Response from WmCreateTopLevelWindow() informing the client of the id for
   // the new window.
   OnWmCreatedTopLevelWindow(uint32 change_id, uint32 window_id);