Remove SetResizeBackgroundColor(), which is unused.

Bug: none
Change-Id: Ib812e35dd14bb3728f87f45d7ee3ccd7875fefc0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1532739
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643363}
4 files changed