GitLab

Stop showing the back button in the search box to remove an unnecessary
tab stop.

Keep the placeholder text left justified and a consistent color with or
without focus.

Video: https://bugs.chromium.org/p/chromium/issues/detail?id=1005166#c27

Fixed: 1005166
Change-Id: Ie6daa2fd659122ca88bda39c2ab2dd36de2acf98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2499803
Commit-Queue: Gavin Williams <gavinwill@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821315}