Friendly ping here.
What's the chance of this making it into M57?
As I've mentioned we have partners (SOASTA / analytics & Ads) blocked on this and waiting to try out Long Tasks Origin Trial.

I have a CL in progress. It needs some cleanup and additional testing, so it's unlikely to land tomorrow. I expect to get it landed and merged to M57 by next week.

Design doc: https://docs.google.com/a/chromium.org/document/d/1oGM6VErHxxvA4JsjstNa6NizC4S5d6f-VrcjHMVYJyE/edit?usp=sharing

Not sure why, but the commit below wasn't added to the bug.

Review-Url: https://codereview.chromium.org/2640823004
Cr-Commit-Position: refs/heads/master@{#447471}
Committed: https://chromium.googlesource.com/chromium/src/+/8206eacd2be4650deb6d9c706533ee6473d6dd3d

Verified in Canary, requesting merge.

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/+/1c1b93c301c2a337af0286eb4146bf5d35ace851

commit 1c1b93c301c2a337af0286eb4146bf5d35ace851
Author: Jason Chase <chasej@chromium.org>
Date: Sat Feb 04 01:56:44 2017

Allow origin trials to be enabled by script

Design doc:
https://docs.google.com/a/chromium.org/document/d/1oGM6VErHxxvA4JsjstNa6NizC4S5d6f-VrcjHMVYJyE/edit?usp=sharing

BUG= 667301 

Review-Url: https://codereview.chromium.org/2640823004
Cr-Commit-Position: refs/heads/master@{#447471}
(cherry picked from commit 8206eacd2be4650deb6d9c706533ee6473d6dd3d)

Review-Url: https://codereview.chromium.org/2673953003 .
Cr-Commit-Position: refs/branch-heads/2987@{#306}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}

[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/VirtualTestSuites
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/disabled-worker.js
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/sample-api-script-added-before-access.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/sample-api-script-added.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/foreignfetch-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/foreignfetch-origin-trial-interfaces.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-script-added.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-script-added.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/resources/foreignfetch-origin-trial-interfaces-worker.php
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-script-added.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-script-added.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces.html
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/http/tests/resources/origin-trials-helper.js
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/README.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/foreignfetch-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/origin-trials-features-disabled/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/README.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/foreignfetch-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/imagecapture-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/longtask-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/rootscroller-origin-trial-interfaces-script-added-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-expected.txt
[add] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/LayoutTests/virtual/stable/http/tests/origin_trials/webexposed/webusb-origin-trial-interfaces-script-added-expected.txt
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/core/v8/ConditionalFeatures.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/core/v8/ConditionalFeatures.h
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/core/v8/LocalWindowProxy.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.h
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/modules/v8/ConditionalFeaturesForModules.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/modules/v8/ConditionalFeaturesForModules.h
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.h
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp
[modify] https://crrev.com/1c1b93c301c2a337af0286eb4146bf5d35ace851/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.h