Implement a MoveCursorToScreenLocation for just the window manager.

ui/aura/mus/window_tree_host_mus.cc

Index: ui/aura/mus/window_tree_host_mus.cc
diff --git a/ui/aura/mus/window_tree_host_mus.cc b/ui/aura/mus/window_tree_host_mus.cc
index 85cdf6a4dbffecb270771c8ea66f2d378295362c..e492d77aaebeafa8be422bbb7b7f44f50415d4a7 100644
--- a/ui/aura/mus/window_tree_host_mus.cc
+++ b/ui/aura/mus/window_tree_host_mus.cc
@@ -200,10 +200,8 @@ gfx::ICCProfile WindowTreeHostMus::GetICCProfileForCurrentDisplay() {
 
 void WindowTreeHostMus::MoveCursorToScreenLocationInPixels(
     const gfx::Point& location_in_pixels) {
-  // TODO: this needs to message the server http://crbug.com/693340. Setting
-  // the location is really only appropriate in tests, outside of tests this
-  // value is ignored.
-  NOTIMPLEMENTED();
+  delegate_->OnWindowTreeHostMoveCursorToScreenLocationInPixels(
+      location_in_pixels);
   Env::GetInstance()->set_last_mouse_location(location_in_pixels);
 }