BUG= https://bugs.chromium.org/p/chromium/issues/detail?id=697191

Change-Id: I01ddd6824b1a79d86944ac766f5c2070e9b0c244
Reviewed-on: https://chromium-review.googlesource.com/448317Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43522}