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This CL has tests that cause the code to be run; there is no easy way
to test the resulting behavior change at JS level.

Bug: chromium:1038754
Change-Id: I51d99e7fffbb66a0478f03d674fb3699925fa3f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1986070
Commit-Queue: Harald Alvestrand <hta@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Henrik Boström <hbos@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825368}