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According to our perf test on linux this shaves off ~0.1 us/task or
about 10% of our current overhead.

Bug: 897751
Change-Id: I79d6cf6bacd2b62be68b7ee028bf6749bec1ff57
Reviewed-on: https://chromium-review.googlesource.com/c/1348097
Commit-Queue: Alex Clarke <alexclarke@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611059}