The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d0698b2368b6e48592d9c0231f63055fff323364

commit d0698b2368b6e48592d9c0231f63055fff323364
Author: zqzhang <zqzhang@chromium.org>
Date: Wed Feb 22 12:20:57 2017

[Blink>Media] Adding rappor metrics to record autoplay muted by attribute usage

We need to analysis which sites are using autoplay muted by attribute.
This CL adds rappor metrics to record the eTLD+1 of the child frame and
top-level frame.

BUG= 693889 

Review-Url: https://codereview.chromium.org/2706593002
Cr-Commit-Position: refs/heads/master@{#452010}

[modify] https://crrev.com/d0698b2368b6e48592d9c0231f63055fff323364/third_party/WebKit/Source/core/html/AutoplayUmaHelper.cpp
[modify] https://crrev.com/d0698b2368b6e48592d9c0231f63055fff323364/tools/metrics/rappor/rappor.xml

Your change meets the bar and is auto-approved for M57. Please go ahead and merge the CL to branch 2987 manually. Please contact milestone owner if you have questions.
Owners: amineer@(clank), cmasso@(bling), ketakid@(cros), govind@(desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3e0428dd812972101ac144c558345858e5b2f2a4

commit 3e0428dd812972101ac144c558345858e5b2f2a4
Author: Zhiqiang Zhang <zqzhang@google.com>
Date: Thu Feb 23 15:46:20 2017

[Blink>Media] Adding rappor metrics to record autoplay muted by attribute usage

We need to analysis which sites are using autoplay muted by attribute.
This CL adds rappor metrics to record the eTLD+1 of the child frame and
top-level frame.

BUG= 693889 

Review-Url: https://codereview.chromium.org/2706593002
Cr-Commit-Position: refs/heads/master@{#452010}
(cherry picked from commit d0698b2368b6e48592d9c0231f63055fff323364)

Review-Url: https://codereview.chromium.org/2709013006 .
Cr-Commit-Position: refs/branch-heads/2987@{#660}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}

[modify] https://crrev.com/3e0428dd812972101ac144c558345858e5b2f2a4/third_party/WebKit/Source/core/html/AutoplayUmaHelper.cpp
[modify] https://crrev.com/3e0428dd812972101ac144c558345858e5b2f2a4/tools/metrics/rappor/rappor.xml