5a3ebd761cb2789aa63e4ae7c0035234a3e3b5f3

This reverts commit 78ae00eea29850bd3bd608287d8b057c88e91b42 due to perf regressions. Reverting during investigation to figure out root causes. BUG=chromium:491112 R=henrik.lundin@webrtc.org TBR=mflodman@webrtc.org Review URL: https://webrtc-codereview.appspot.com/56449004 Cr-Commit-Position: refs/heads/master@{#9283}
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