The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/003fade38f4d89100f517a6469abeb84cd9db165

commit 003fade38f4d89100f517a6469abeb84cd9db165
Author: bmcquade <bmcquade@chromium.org>
Date: Fri Apr 15 18:21:43 2016

Provide currently_committed_url to PageLoadMetricsObservers

This allows us to track metrics based on where the user is navigating from.
A referer can be used to accomplish this in some cases, though referers
are not always available or may be sanitized to include only the origin
in some cases.

BUG= 603948 

Review URL: https://codereview.chromium.org/1879413002

Cr-Commit-Position: refs/heads/master@{#387649}

[modify] https://crrev.com/003fade38f4d89100f517a6469abeb84cd9db165/components/page_load_metrics/browser/metrics_web_contents_observer.cc
[modify] https://crrev.com/003fade38f4d89100f517a6469abeb84cd9db165/components/page_load_metrics/browser/metrics_web_contents_observer.h
[modify] https://crrev.com/003fade38f4d89100f517a6469abeb84cd9db165/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
[modify] https://crrev.com/003fade38f4d89100f517a6469abeb84cd9db165/components/page_load_metrics/browser/page_load_metrics_observer.h

Your change meets the bar and is auto-approved for M51 (branch: 2704)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0c2396d866a38f3f3a25f46c332d56cf4c69d67e

commit 0c2396d866a38f3f3a25f46c332d56cf4c69d67e
Author: Josh Karlin <jkarlin@chromium.org>
Date: Wed Apr 20 13:38:34 2016

Provide currently_committed_url to PageLoadMetricsObservers

This allows us to track metrics based on where the user is navigating from.
A referer can be used to accomplish this in some cases, though referers
are not always available or may be sanitized to include only the origin
in some cases.

BUG= 603948 

Review URL: https://codereview.chromium.org/1879413002

Cr-Commit-Position: refs/heads/master@{#387649}
(cherry picked from commit 003fade38f4d89100f517a6469abeb84cd9db165)

Review URL: https://codereview.chromium.org/1900343003 .

Cr-Commit-Position: refs/branch-heads/2704@{#144}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}

[modify] https://crrev.com/0c2396d866a38f3f3a25f46c332d56cf4c69d67e/components/page_load_metrics/browser/metrics_web_contents_observer.cc
[modify] https://crrev.com/0c2396d866a38f3f3a25f46c332d56cf4c69d67e/components/page_load_metrics/browser/metrics_web_contents_observer.h
[modify] https://crrev.com/0c2396d866a38f3f3a25f46c332d56cf4c69d67e/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
[modify] https://crrev.com/0c2396d866a38f3f3a25f46c332d56cf4c69d67e/components/page_load_metrics/browser/page_load_metrics_observer.h