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This was added in [1] to deal with the login web page. I believe
this is no longer relevant.

[1] https://chromiumcodereview.appspot.com/10454017

Bug: None
Test: login/oobe screen works as is.
Change-Id: Ib6275fe7a4c934797631e00c1c4a29ed650b5502
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062672Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742320}