Remove content border for opaque frame in Refresh

Under Refresh there's no top border drawn by the tabstrip. As such the
three other strokes that form the content border look cut off and out of
place. This change removes them when Refresh is turned on.

Bug: chromium:848549
Change-Id: If77903b5b275f6d0deee6d22d88a3725885137f2
Reviewed-on: https://chromium-review.googlesource.com/1132543
Commit-Queue: Peter Boström <pbos@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576355}
10 files changed