ref: f3beca079c9dcc0b1b4ef6332aceb1917694ea4a
parent: 1e8b5bf4ac494a6fc3e8d773c3a0eff9d09cb7c3
parent: 118c8fb3fb3ca5e49227655acb1b3e28c12339fa
author: Dmitry Kovalev <dkovalev@google.com>
date: Thu Dec 26 08:41:02 EST 2013
Merge "Calculating has_second_ref only once for single_ref context."