[Views] Make ConvertPointToScreen work without Widget.

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index 3c2aed7dbab63c64d06b4554d32574d33b66d92f..883414ed6720e891d42cd84f28736f755122c912 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -679,11 +679,10 @@ void View::ConvertPointToScreen(const View* src, gfx::Point* p) {
   DCHECK(p);
 
   // If the view is not connected to a tree, there's nothing we can do.
+  ConvertPointToWidget(src, p);
   const Widget* widget = src->GetWidget();
-  if (widget) {
-    ConvertPointToWidget(src, p);
+  if (widget)
     *p += widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
-  }
 }
 
 // static
@@ -692,9 +691,8 @@ void View::ConvertPointFromScreen(const View* dst, gfx::Point* p) {
   DCHECK(p);
 
   const views::Widget* widget = dst->GetWidget();
-  if (!widget)
-    return;
-  *p -= widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
+  if (widget)
+    *p -= widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
   views::View::ConvertPointFromWidget(dst, p);
 }