This restores assertion scope marking in the bta command making it
obvious which frames disallowed heap allocation for instance.

Change-Id: Ie99ff06df95b6ab6820e53798b12b1cd1bd97338
Reviewed-on: https://chromium-review.googlesource.com/c/1477213Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59676}