The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a587e3326042a79d8f22d493e63d19f7c3ae1086

commit a587e3326042a79d8f22d493e63d19f7c3ae1086
Author: tkent <tkent@chromium.org>
Date: Mon May 09 16:31:50 2016

Count usage of PROGRESS element with -webkit-appearance:none.

This CL has no user-visible behavior changes.

BUG= 610212 
R=kochi@chromium.org
TBR=jwd@chromium.org

Review-Url: https://codereview.chromium.org/1956293002
Cr-Commit-Position: refs/heads/master@{#392333}

[modify] https://crrev.com/a587e3326042a79d8f22d493e63d19f7c3ae1086/third_party/WebKit/Source/core/frame/UseCounter.h
[modify] https://crrev.com/a587e3326042a79d8f22d493e63d19f7c3ae1086/third_party/WebKit/Source/core/html/HTMLProgressElement.cpp
[modify] https://crrev.com/a587e3326042a79d8f22d493e63d19f7c3ae1086/tools/metrics/histograms/histograms.xml

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/+/b431e433045fcf19b1bdfa2af0a017720b2b741b

commit b431e433045fcf19b1bdfa2af0a017720b2b741b
Author: Kent Tamura <tkent@chromium.org>
Date: Tue May 10 22:55:42 2016

Merge "Count usage of PROGRESS element with -webkit-appearance:none." to M51

This CL has no user-visible behavior changes.

BUG= 610212 
R=kochi@chromium.org
TBR=jwd@chromium.org

Review-Url: https://codereview.chromium.org/1956293002
Cr-Commit-Position: refs/heads/master@{#392333}
(cherry picked from commit a587e3326042a79d8f22d493e63d19f7c3ae1086)

Review URL: https://codereview.chromium.org/1964223002 .

Cr-Commit-Position: refs/branch-heads/2704@{#485}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}

[modify] https://crrev.com/b431e433045fcf19b1bdfa2af0a017720b2b741b/third_party/WebKit/Source/core/frame/UseCounter.h
[modify] https://crrev.com/b431e433045fcf19b1bdfa2af0a017720b2b741b/third_party/WebKit/Source/core/html/HTMLProgressElement.cpp