Standardize Screen::GetCursorScreenPoint() on Env::last_mouse_location

ui/views/mus/mus_client.cc

Index: ui/views/mus/mus_client.cc
diff --git a/ui/views/mus/mus_client.cc b/ui/views/mus/mus_client.cc
index 62cd075cfdaf2401ec6647bde8a044a6d879c4da..1ac3a789bc6bd5e1840f07b632a17958003253d3 100644
--- a/ui/views/mus/mus_client.cc
+++ b/ui/views/mus/mus_client.cc
@@ -262,10 +262,6 @@ aura::PropertyConverter* MusClient::GetPropertyConverter() {
   return property_converter_.get();
 }
 
-gfx::Point MusClient::GetCursorScreenPoint() {
-  return window_tree_client_->GetCursorScreenPoint();

[Elliot Glaysher, 2017/01/09 18:16:42]

Remove the window tree client code too?

(Or are you ignoring this since you plan on just deleting
services/ui/public/cpp/ soon?)

[sky, 2017/01/09 18:20:23]

We still need both. As clients don't see all events they need to use
WindowTreeClient::GetCursorScreenPoint() outside of event dispatching. In other
words Env::last_mouse_location() needs to call
WindowTreeClient::GetCursorScreenPoint() if called outside of event dispatching.
I filed 679402 for this.

-}
-
 aura::Window* MusClient::GetWindowAtScreenPoint(const gfx::Point& point) {
   for (aura::Window* root : window_tree_client_->GetRoots()) {
     aura::WindowTreeHost* window_tree_host = root->GetHost();