am 14ad07f6: Merge change 1708 into donut

Merge commit '14ad07f604ecd08436680a046363d37952c278f6'

* commit '14ad07f604ecd08436680a046363d37952c278f6':
  Fixes #1853550. Prevent NPE when calling the PopupWindow() and PopupWindow(int, int) constructors. Instead, throw an IllegalStateException when trying to show a popup with no content view.
tree: 7c412e77bff1f37ceb3140afb70607df3be538ea
  1. awt/
  2. camera/
  3. cmds/
  4. im/
  5. include/
  6. libs/
  7. opengl/
  8. MODULE_LICENSE_APACHE2
  9. NOTICE