This reverts committ: https://crrev.com/ebbf3c1bf5f41b0133657515302e3b110abedee1

Broke on the Win8 gn bot which doesn't appear to be in the CQ and treats
signedness of characters differently than all other configurations.

BUG=467176
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/1012773009

Cr-Commit-Position: refs/heads/master@{#322210}