am a08a0a7b: am a13a02cd: New permission for non-purgeable cache downloads.

Merge commit 'a08a0a7bee7ba09917b94e41c705a643c8e06a1a'

* commit 'a08a0a7bee7ba09917b94e41c705a643c8e06a1a':
  New permission for non-purgeable cache downloads.