The C++11 here was overkill. This replaces it with simpler logic that covers all cases encountered so far in practice. The problem was previously brought up here: https://codereview.webrtc.org/1250663007/ BUG=427718, 487341, webrtc:4866 R=andrew@webrtc.org Review URL: https://codereview.webrtc.org/1242943008 Cr-Commit-Position: refs/heads/master@{#9627}