Moving this nonessential bug to the next milestone.

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/+/cc74c3a6422be9a25c635021a57f7f0950c0381c

commit cc74c3a6422be9a25c635021a57f7f0950c0381c
Author: zqzhang <zqzhang@chromium.org>
Date: Mon Aug 22 20:30:20 2016

Record the offscreen playing duration of autoplaying muted videos

BUG= 617681 

Review-Url: https://codereview.chromium.org/2101613002
Cr-Commit-Position: refs/heads/master@{#413522}

[modify] https://crrev.com/cc74c3a6422be9a25c635021a57f7f0950c0381c/third_party/WebKit/LayoutTests/media/video-autoplay-experiment-modes-expected.txt
[modify] https://crrev.com/cc74c3a6422be9a25c635021a57f7f0950c0381c/third_party/WebKit/Source/core/html/AutoplayUmaHelper.cpp
[modify] https://crrev.com/cc74c3a6422be9a25c635021a57f7f0950c0381c/third_party/WebKit/Source/core/html/AutoplayUmaHelper.h
[modify] https://crrev.com/cc74c3a6422be9a25c635021a57f7f0950c0381c/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/36d7422fbb9f27d2a931e91edcabe473a2d55772

commit 36d7422fbb9f27d2a931e91edcabe473a2d55772
Author: megjablon <megjablon@chromium.org>
Date: Tue Aug 23 02:12:37 2016

Revert "Record the offscreen playing duration of autoplaying muted videos"

This reverts commit cc74c3a6422be9a25c635021a57f7f0950c0381c.

Tests failing on https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Leak:
media/autoplay-muted.html
media/autoplay-unmute-offscreen.html
media/autoplay-when-visible.html

15:30:48.155 15954 worker/3 media/autoplay-unmute-offscreen.html leaked
15:30:48.155 15954   Xlib:  extension "RANDR" missing on display ":9".
15:30:48.155 15954   Xlib:  extension "RANDR" missing on display ":9".
15:30:48.155 15954   [4:4:0822/153047:2028208541:WARNING:webmediaplayer_impl.cc(372)] Using MultibufferDataSource
15:30:48.155 15954   [4:4:0822/153047:2028209045:WARNING:webmediaplayer_impl.cc(372)] Using MultibufferDataSource
15:30:48.158 18115 [35/36] media/autoplay-unmute-offscreen.html failed unexpectedly (leak detected: ({"numberOfLiveActiveDOMObjects":[2,3]}))
15:30:48.157 15954 worker/3 media/autoplay-unmute-offscreen.html failed:
15:30:48.157 15954 worker/3  leak detected: ({"numberOfLiveActiveDOMObjects":[2,3]})

TBR=isherman@chromium.org, mlamouri@chromium.org
BUG= 617681 

Review-Url: https://codereview.chromium.org/2266253002
Cr-Commit-Position: refs/heads/master@{#413635}

[modify] https://crrev.com/36d7422fbb9f27d2a931e91edcabe473a2d55772/third_party/WebKit/LayoutTests/media/video-autoplay-experiment-modes-expected.txt
[modify] https://crrev.com/36d7422fbb9f27d2a931e91edcabe473a2d55772/third_party/WebKit/Source/core/html/AutoplayUmaHelper.cpp
[modify] https://crrev.com/36d7422fbb9f27d2a931e91edcabe473a2d55772/third_party/WebKit/Source/core/html/AutoplayUmaHelper.h
[modify] https://crrev.com/36d7422fbb9f27d2a931e91edcabe473a2d55772/tools/metrics/histograms/histograms.xml

Hmm, the leak is flaky on debug build but 100% repro on release build.
Trying to find the cause.

Issue 640213 has been merged into this issue.

The CL is also causing a crash :(
The crash is simple to fix, just add null-check when calling m_element->removeEventListener()

Users experienced this crash on the following builds:

Mac Canary 54.0.2837.0 -  12.62 CPM, 7 reports, 6 clients (signature blink::AutoplayUmaHelper::maybeStopRecordingMutedVideoOffscreenDuration)

If this update was incorrect, please add "Fracas-Wrong" label to prevent future updates.

- Go/Fracas

Users experienced this crash on the following builds:

Win Canary 54.0.2837.0 -  6.44 CPM, 25 reports, 12 clients (signature blink::AutoplayUmaHelper::maybeStopRecordingMutedVideoOffscreenDuration)
Win Canary 54.0.2837.0 -  15.70 CPM, 61 reports, 34 clients (signature blink::EventTarget::removeEventListener)
Mac Canary 54.0.2837.0 -  15.05 CPM, 10 reports, 9 clients (signature blink::AutoplayUmaHelper::maybeStopRecordingMutedVideoOffscreenDuration)

If this update was incorrect, please add "Fracas-Wrong" label to prevent future updates.

- Go/Fracas

This crash has high impact on Chrome's stability.
Signature: blink::EventTarget::removeEventListener.
Channel: canary. Platform: win.
Labeling  issue 617681  with ReleaseBlock-Dev.


If this update was incorrect, please add "Fracas-Wrong" label to prevent future updates.

- Go/Fracas

Just to update comparing to previous milestone M53dev, this is a top # 2 crasher on current M54 dev 54.0.2837.0. Currently there are 900 crash instances from 627 client Ids.
Link to crashes : https://crash.corp.google.com/browse?q=product.name%3D%27Chrome%27%20AND%20custom_data.ChromeCrashProto.magic_signature_1.name%3D%27blink%3A%3AEventTarget%3A%3AremoveEventListener%27%20AND%20product.Version%3D%2754.0.2837.0%27&ignore_case=false&enable_rewrite=true&omit_field_name=&omit_field_value=&omit_field_opt=%3D
Added ReleaseBlock-Beta against M54, please modify if not appropriate.

Hi Durga,
Seems like I should not merge the original crbug issue into this one, which is redirecting all crash warnings here.

The crash should already been fixed now. I'll remove the crbug in go/chromecrash.

Issue 640951 has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d791630a5f638c81b21284a7a8a22778c315cdde

commit d791630a5f638c81b21284a7a8a22778c315cdde
Author: zqzhang <zqzhang@chromium.org>
Date: Tue Sep 13 09:50:42 2016

Reland "Record the offscreen playing duration of autoplaying muted videos"

Seems the memory leak has already been fixed somewhere. Relanding this CL.

BUG= 617681 , 640195 
TBR=mlamouri@chromium.org,isherman@chromium.org

Review-Url: https://codereview.chromium.org/2331893003
Cr-Commit-Position: refs/heads/master@{#418208}

[modify] https://crrev.com/d791630a5f638c81b21284a7a8a22778c315cdde/third_party/WebKit/LayoutTests/media/video-autoplay-experiment-modes-expected.txt
[modify] https://crrev.com/d791630a5f638c81b21284a7a8a22778c315cdde/third_party/WebKit/Source/core/html/AutoplayUmaHelper.cpp
[modify] https://crrev.com/d791630a5f638c81b21284a7a8a22778c315cdde/third_party/WebKit/Source/core/html/AutoplayUmaHelper.h
[modify] https://crrev.com/d791630a5f638c81b21284a7a8a22778c315cdde/tools/metrics/histograms/histograms.xml

Fixed? :)

Yes!