The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/be5dee1c8115184d96d97327e6e66e8eb035be92

commit be5dee1c8115184d96d97327e6e66e8eb035be92
Author: bmcquade <bmcquade@chromium.org>
Date: Mon Aug 01 18:48:43 2016

Remove dom_loading from page_load_metrics

dom_loading has been deprecated in the navigation timing spec, so we
are removing it from page_load_metrics metrics as well. See
https://github.com/w3c/navigation-timing/issues/13 for more details.

BUG= 632331 

Review-Url: https://codereview.chromium.org/2190723005
Cr-Commit-Position: refs/heads/master@{#409009}

[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/browser/page_load_metrics/metrics_web_contents_observer.cc
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.cc
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/common/page_load_metrics/page_load_metrics_messages.h
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/common/page_load_metrics/page_load_timing.cc
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/common/page_load_metrics/page_load_timing.h
[modify] https://crrev.com/be5dee1c8115184d96d97327e6e66e8eb035be92/chrome/renderer/page_load_metrics/metrics_render_frame_observer.cc