1380e266ff48be9718ce0867cfd65058cb09c5fc

These changes stem from requests by Andrew on https://codereview.webrtc.org/1228823002/ to eliminate some "return -1"s and change to using asserts plus returning size_ts. I then also converted the relevant connected bits. This also cleans up a bunch of style issues, e.g. no spaces around operators. BUG=chromium:81439 TEST=none R=andrew@webrtc.org, henrik.lundin@webrtc.org, niklas.enbom@webrtc.org Review URL: https://codereview.webrtc.org/1305983003 . Cr-Commit-Position: refs/heads/master@{#9813}
Revert of Fix PRESUBMIT.py after disabling CQ. (patchset #1 id:1 of https://codereview.webrtc.org/1192673003/)
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