GitLab

Make sure MHTML document works correctly regarding sandbox flags.

Bug: 1041376
Change-Id: I6bc12e7ab5861f51f39af44005f715c603c78e3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450152
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814589}