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This has been a feature request from a number of people for a long time
and was fairly simple to implement.

Change-Id: I7d25a563f654b3fd07f1d4c15cd274dcac65236b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2430766
Commit-Queue: Dana Fried <dfried@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811189}