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This is a reland of 15c84b57

Original change's description:
> Media Engagement: only use/record for HTTPS origins.
> 
> Bug: 958364
> Change-Id: Ifc87e6222df9de526f2900f13899af616604750e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1591878
> Reviewed-by: Becca Hughes <beccahughes@chromium.org>
> Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#659971}

Bug: 958364
Change-Id: I2e1c9741946797875fca63524260ad5d066f74cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614442
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660841}