Implement a MoveCursorToScreenLocation for just the window manager.

services/ui/ws/window_manager_state.cc

Index: services/ui/ws/window_manager_state.cc
diff --git a/services/ui/ws/window_manager_state.cc b/services/ui/ws/window_manager_state.cc
index a36a9b1f252662b0457bd0507bbff40b44787f85..6435f36843fc129b19bda6506b4682b6f7de4e52 100644
--- a/services/ui/ws/window_manager_state.cc
+++ b/services/ui/ws/window_manager_state.cc
@@ -192,6 +192,12 @@ void WindowManagerState::ReleaseCaptureBlockedByAnyModalWindow() {
   event_dispatcher_.ReleaseCaptureBlockedByAnyModalWindow();
 }
 
+void WindowManagerState::SetCursorLocation(
+    const gfx::Point& screen_pixel_location) {
+  event_dispatcher()->SetMousePointerDisplayLocation(screen_pixel_location, -1);

[Elliot Glaysher, 2017/05/31 23:47:32]

This here is obviously incorrect in the multi-display case (though it works in
the single display case in tests), but I don't see an easy way to go from this
screen pixels to display location. Is there some helper function I've missed?

[riajiang, 2017/06/01 17:06:07]

In WindowTreeHost::MoveCursorToInternal, can we convert |host_location|
(screen-location-in-pixels?) to display-location-in-pixels by subtracting
GetLocationOnScreenInPixels() and then also pass display_id from there to
WindowTreeHostMus::MoveCursorToScreenLocationInPixels?

+  UpdateNativeCursorFromDispatcher();
+}
+
 void WindowManagerState::SetDragDropSourceWindow(
     DragSource* drag_source,
     ServerWindow* window,