Enforce comment formatting in modules/

Also rewrap a few last comments that landed in the last day.

Like https://codereview.chromium.org/2391793003/ but for modules.

BUG=563793
NOTRY=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2394883002
Cr-Commit-Position: refs/heads/master@{#423206}
6 files changed