The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e74c18d1bc755aff8a135a18308554b75ef90d60

commit e74c18d1bc755aff8a135a18308554b75ef90d60
Author: Liquan (Max) Gu <maxlg@chromium.org>
Date: Mon Aug 28 23:49:12 2017

Long tasks v2: implement probe::V8 Execute Script

This CL is to implement probe::V8ExecuteScript as an effort to attribute long tasks with the subtasks 'script-run'. 'script-run' corresponds to V8ScriptRunner::RunCompileScript() and v8ScriptRunner::EvaluateModule().

The probe records the url of culprit script, and finally become entries in the attribution of long task performance entries.

This feature is temporarily hidden behind a command line flag "LongTaskV2".

Bug:  757858 
Change-Id: Idacbfeb2221a7dc5c5cc0f8807863af7c736a21c
Reviewed-on: https://chromium-review.googlesource.com/627418
Commit-Queue: Liquan Gu <maxlg@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Shubhie Panicker <panicker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497941}
[modify] https://crrev.com/e74c18d1bc755aff8a135a18308554b75ef90d60/third_party/WebKit/Source/core/frame/PerformanceMonitor.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4af39544053707097c14c22f25a20a09a4704cae

commit 4af39544053707097c14c22f25a20a09a4704cae
Author: Liquan (Max) Gu <maxlg@chromium.org>
Date: Thu Aug 31 08:21:54 2017

[LongTask] Layout tests for 'script-run' attribution

After implementing the probe::ExecuteScript(), any long task which takes more
than 12ms to execute script will result in adding an attribute of 'script-run' of
a performance long task timing entry, a feature behind a runtime feature
flag - LongTaskV2. But there is no test covering this behavior yet, so this CL
is to provide Layout test to cover this behavior.

Bug:  757858 
Change-Id: I54c02c4d244095f32fa79b72a5e5e38aa62ead2e
Reviewed-on: https://chromium-review.googlesource.com/639359
Commit-Queue: Liquan Gu <maxlg@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498786}
[modify] https://crrev.com/4af39544053707097c14c22f25a20a09a4704cae/third_party/WebKit/LayoutTests/VirtualTestSuites
[add] https://crrev.com/4af39544053707097c14c22f25a20a09a4704cae/third_party/WebKit/LayoutTests/http/tests/performance-timing/longtask-v2/longtask-executescript-expected.txt
[add] https://crrev.com/4af39544053707097c14c22f25a20a09a4704cae/third_party/WebKit/LayoutTests/http/tests/performance-timing/longtask-v2/longtask-executescript.html
[add] https://crrev.com/4af39544053707097c14c22f25a20a09a4704cae/third_party/WebKit/LayoutTests/virtual/longtask-v2/http/tests/performance-timing/longtask-v2/README.txt
[add] https://crrev.com/4af39544053707097c14c22f25a20a09a4704cae/third_party/WebKit/LayoutTests/virtual/mojo-loading/http/tests/performance-timing/longtask-v2/README.txt

Should we mark this as 'finished'?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3c3bf609ebf12e1112211071582b78f3e61fd086

commit 3c3bf609ebf12e1112211071582b78f3e61fd086
Author: Liquan (Max) Gu <maxlg@chromium.org>
Date: Wed Oct 11 17:10:30 2017

[LongTaskV2]Fix failed test of script-run instrumentation of LongTaskV2

This Cl is to fix the failed test longtask-executescript when enabling
the LongTaskV2 blink feature and change the way of verifying the attributes
to make it easier to understand.

Bug:  757858 
Change-Id: I662c0cad355478ddb0bf6008aedb1906ad6d8dd7
Reviewed-on: https://chromium-review.googlesource.com/703116
Commit-Queue: Liquan Gu <maxlg@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Reviewed-by: Shubhie Panicker <panicker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#508010}
[modify] https://crrev.com/3c3bf609ebf12e1112211071582b78f3e61fd086/third_party/WebKit/LayoutTests/VirtualTestSuites
[modify] https://crrev.com/3c3bf609ebf12e1112211071582b78f3e61fd086/third_party/WebKit/LayoutTests/http/tests/performance-timing/longtask-v2/longtask-executescript-expected.txt
[modify] https://crrev.com/3c3bf609ebf12e1112211071582b78f3e61fd086/third_party/WebKit/LayoutTests/http/tests/performance-timing/longtask-v2/longtask-executescript.html
[add] https://crrev.com/3c3bf609ebf12e1112211071582b78f3e61fd086/third_party/WebKit/LayoutTests/virtual/longtask-v2/http/tests/performance-timing/longtask-v2/longtask-executescript-expected.txt