commit 9d37d5147d8b9d9a20bd1b55f2f7daad06ed0c3e
author Jay Harris <harrisjay@chromium.org> Fri Dec 21 00:42:40 2018
committer Commit Bot <commit-bot@chromium.org> Fri Dec 21 00:42:40 2018
tree c7bb8e73533b51727488af113285f659aee6c8f9
parent a4bd5ce4b8ed521ad948786963eacf35360405f4

Stop drawing border between window frame and toolbar in PWAs.

The custom tab bar should appear as an extension of the
title bar. Before this CL, this was not not the case on
Linux or Windows without DWM (disable-dwm-composition),
as we draw small borders between the window frame and the
toolbar. This CL removes them when displaying the custom
tab bar.

Before: https://bugs.chromium.org/p/chromium/issues/attachment?aid=372746&signed_aid=ybrF8gUqHfRhz-mI-R7-SQ==&inline=1
After: https://bugs.chromium.org/p/chromium/issues/attachment?aid=372747&signed_aid=-_9BQ_5YxzT6Gg67Aj49ag==&inline=1

Bug: 853593
Change-Id: Ice90aef02c074d344066f8b5dd8e50fe77310a8e
Reviewed-on: https://chromium-review.googlesource.com/c/1385685
Commit-Queue: Jay Harris <harrisjay@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618404}