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There is still a few cases it prints the warning when
it shouldn't. (in mirroring display scenario)
I'll address it in next CL.

Bug: None
Change-Id: Id254aab0788ab19f6ff970f495be98c7a0ee6e32
Reviewed-on: https://chromium-review.googlesource.com/c/1352032Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612944}