More policy comment fixes No functional change. BUG=none Review-Url: https://codereview.chromium.org/2963953002 Cr-Original-Commit-Position: refs/heads/master@{#483353} Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src Cr-Mirrored-Commit: ee7fb0f854155603706dbeaeed71a250e2cbccb5