Since there's some overhead to each log statement we'll build the entire
log message before logging it.
Bug: webrtc:8529
Change-Id: I04876c7309afdd75985aa84726f8177e5a44bdb5
Reviewed-on: https://webrtc-review.googlesource.com/54301
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22097}