tree cf131b61e127f91c414954cc3ab038aa498a6018
parent 92ca333976cf381de004945f95fa1e347d0a3a0e
author Mathieu Chartier <mathieuc@google.com> 1444956468 -0700
committer Mathieu Chartier <mathieuc@google.com> 1445632015 -0700

Add ArenaUniquePtr

Motivation is to use it for adding arenas in the verifier.
Also added arena tags to prevent double free errors.

Bug: 10921004
Change-Id: I545f3374eceb9a6a35e738cb899d1493098fb760