ref: cd9ae6d7582579d7a644b1bf9b7037d66c49dc3b
parent: f79f71fc2209e9e69a280c71dd421bd3287ff155
parent: e8a4a3e2b1a4b6ff62a33ca47841617c0e75e288
author: Marco Paniconi <marpan@google.com>
date: Fri Sep 11 17:39:06 EDT 2015
Merge "Avoid scaling last_source, unless needed."