GitLab

Too many crashes and out of ideas for how to resolve this for right
now; this at least provides the chance that these users might unhang
themselves some time after the 2 minute hang timer.

BUG=422522, 468074, 478932
TEST=start w/ and w/o hang monitor according to channel, flags.

Review URL: https://codereview.chromium.org/1105083004

Cr-Commit-Position: refs/heads/master@{#327356}