GitLab

What:
No longer parse impressiondata as hex, or use hex when sending
conversion reports.

Why:
This causes needless conversions for developers, as raised on
https://github.com/WICG/conversion-measurement-api/issues/60

Note that the conversions database stores imp and conversion data as
strings currently because they are represented as hex. These can
be converted to strings now, but this is left as a followup.

Bug: 1163599
Change-Id: I5b164c380a97cb272c6a0ee698df8b744feb58ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2611958Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: John Delaney <johnidel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842561}