GitLab

Wrap error reports in "### (BEGIN|END) MEMORY TOOL REPORT". This will allow us
to extract them with GTestLogParser and use them as snippets.

BUG=453020
R=thestig@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/884813002

Cr-Commit-Position: refs/heads/master@{#313572}