Domain Reliability: Get correct reporting pref once, on startup

Instead of wiring the reporting pref all the way down to the Monitor,
grab it once in the ProfileImplIOData, where it's easily accessible and
we already have code to check the right pref on ChromeOS/Android/*.

BUG=409967

Review URL: https://codereview.chromium.org/615313006

Cr-Commit-Position: refs/heads/master@{#298394}
8 files changed