Log where?

Also ensure it gets logged to intervention-internals page

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/58c0f05df06cfe592fea28304cdb68343c120339

commit 58c0f05df06cfe592fea28304cdb68343c120339
Author: Doug Arnett <dougarnett@chromium.org>
Date: Thu Nov 16 03:45:55 2017

Adds eligibility reasons for NoScript preview

Adds reason for not being whitelisted and also a new Allowed
reason for when server optimization hints we not enabled and
so not checked.

Bug:  780859 ,  782860 
Change-Id: Idedd812f0331b3e32f271fbac7268b535100227a
Reviewed-on: https://chromium-review.googlesource.com/764589
Reviewed-by: Ryan Sturm (OOO until 11/27) <ryansturm@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Doug Arnett <dougarnett@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516973}
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/components/previews/content/previews_io_data.cc
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/components/previews/content/previews_io_data_unittest.cc
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/components/previews/core/previews_black_list.h
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/components/previews/core/previews_logger.cc
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/components/previews/core/previews_logger_unittest.cc
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/58c0f05df06cfe592fea28304cdb68343c120339/tools/metrics/histograms/histograms.xml