The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1bf776b86d79c44b7d5ea62dea005bff5d58152a

commit 1bf776b86d79c44b7d5ea62dea005bff5d58152a
Author: Charlie Harrison <csharrison@chromium.org>
Date: Fri May 18 13:39:11 2018

[subresource_filter] Move ukm recording out of page_load_metrics

Bug:  843832 
Change-Id: Ic9364d956486268a07189b4cb8e3c5ad0f62ea55
Reviewed-on: https://chromium-review.googlesource.com/1062825
Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Bryan McQuade <bmcquade@chromium.org>
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559880}
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer.cc
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer.h
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/components/subresource_filter/content/browser/BUILD.gn
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/components/subresource_filter/content/browser/DEPS
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
[modify] https://crrev.com/1bf776b86d79c44b7d5ea62dea005bff5d58152a/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9c91a8d29f3dc55ffe345456663668a1d61f036e

commit 9c91a8d29f3dc55ffe345456663668a1d61f036e
Author: Charlie Harrison <csharrison@chromium.org>
Date: Fri May 18 18:24:45 2018

Remove subresource_filter page_load_metrics

This migrates one histogram which logs the ActivationDecision to
the safe browsing throttle, since it makes sense to have UMA alongisde
the UKM.

PageLoad.Clients.SubresourceFilter.Count can be replaced by looking
at the 0 bucket of:
SubresourceFilter.PageLoad.NumSubresourceLoads.MatchedRules

Bug:  843832 
Change-Id: I8e1f0724abe841497e914cca5ef3ce2030827aad
Reviewed-on: https://chromium-review.googlesource.com/1064175
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Gayane Petrosyan <gayane@chromium.org>
Reviewed-by: Bryan McQuade <bmcquade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559965}
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/chrome/browser/BUILD.gn
[delete] https://crrev.com/71b6abec310f1025bd2147b6b0bc2bb7904a1c29/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer.cc
[delete] https://crrev.com/71b6abec310f1025bd2147b6b0bc2bb7904a1c29/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer.h
[delete] https://crrev.com/71b6abec310f1025bd2147b6b0bc2bb7904a1c29/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/chrome/browser/page_load_metrics/page_load_metrics_initialize.cc
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/chrome/browser/subresource_filter/subresource_filter_browsertest.cc
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/chrome/test/BUILD.gn
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
[modify] https://crrev.com/9c91a8d29f3dc55ffe345456663668a1d61f036e/tools/metrics/histograms/histograms.xml