The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0d6f62c738b9b3717139bd41deb0fde1cba4a206

commit 0d6f62c738b9b3717139bd41deb0fde1cba4a206
Author: Bryan McQuade <bmcquade@chromium.org>
Date: Fri Jun 30 20:00:56 2017

[page load metrics]: Ignore non HTTP/HTTPS resource loads

Bug:  738509 
Change-Id: I0ee67acbfcda4d6ad608a8ecc194bc094ce381d6
Reviewed-on: https://chromium-review.googlesource.com/558425
Commit-Queue: Bryan McQuade <bmcquade@chromium.org>
Reviewed-by: Josh Karlin <jkarlin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#483797}
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/metrics_web_contents_observer.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/metrics_web_contents_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/ads_page_load_metrics_observer.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/data_reduction_proxy_metrics_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/lofi_page_load_metrics_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/media_page_load_metrics_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/subresource_filter_metrics_observer_unittest.cc
[modify] https://crrev.com/0d6f62c738b9b3717139bd41deb0fde1cba4a206/chrome/browser/page_load_metrics/observers/tab_restore_page_load_metrics_observer_unittest.cc