tree 3a5c2e146afbaa0cc8041d1ff267cc8936de83b6
parent acc642bce9e1ca1782c8f93131d944d4a2f92be0
author Jeff Sharkey <jsharkey@android.com> 1382486984 -0700
committer Jeff Sharkey <jsharkey@android.com> 1382545393 -0700

Treat document thumbnails as preemptable.

When a more important request comes along, preempt all outstanding
thumbnail requests.

Bug: 11317901
Change-Id: I164fc8d804bb9c471e6da3f8127228043b3ca482