Implement ui_controls for aura

ui/aura/desktop_host_win.cc

Index: ui/aura/desktop_host_win.cc
diff --git a/ui/aura/desktop_host_win.cc b/ui/aura/desktop_host_win.cc
index 36399e2da5e38ceaaf6499eb2390d28ea92b62f2..f2147d5b00b77b3249fbeced719fdf1d43428b54 100644
--- a/ui/aura/desktop_host_win.cc
+++ b/ui/aura/desktop_host_win.cc
@@ -230,6 +230,12 @@ void DesktopHostWin::PostNativeEvent(const base::NativeEvent& native_event) {
       hwnd(), native_event.message, native_event.wParam, native_event.lParam);
 }
 
+void DesktopHostWin::ConvertPointToNativeScreen(gfx::Point* point) const {
+  RECT r;
+  GetClientRect(hwnd(), &r);
+  point->Offset(r.left, r.top);
+}
+
 void DesktopHostWin::OnClose() {
   // TODO: this obviously shouldn't be here.
   MessageLoopForUI::current()->Quit();