am 9d6824cd: Merge "Make Activity.removeDialog() less strict." into gingerbread

Merge commit '9d6824cd53960b4562ea3c55876b40ca21710050' into gingerbread-plus-aosp

* commit '9d6824cd53960b4562ea3c55876b40ca21710050':
  Make Activity.removeDialog() less strict.