Chrome OS - Show caption buttons in tablet mode for settings app

They're only meant to be hidden for the normal browser window.
Since the frame is usually hidden in tablet mode, this is only
relevant during an immersive reveal.

Bug: none
Change-Id: I863749274a8d0f40d230e52d5ef0a7a034f3f838
Reviewed-on: https://chromium-review.googlesource.com/c/1417122
Auto-Submit: Evan Stade <estade@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623822}
1 file changed