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This UI element is only used in c/b/r/chromeos/arc_support/ and does not
justify residing within shared WebUI code. Moreover it was previously
unnecessarily included in non-CrOS builds.

Bug: None
Change-Id: I0e2da5f89995b8d747bdeed11343e59ddaccedd0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568609Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Commit-Queue: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836107}