am c6e1d880: Merge "Introduce official public NativeWindow type." into gingerbread

Merge commit 'c6e1d88022db800773401c16803e1ab27fd01a7e' into gingerbread-plus-aosp

* commit 'c6e1d88022db800773401c16803e1ab27fd01a7e':
  Introduce official public NativeWindow type.