You are probably looking for a change made after 479930 (known good), but no later than 479931 (first known bad).

CHANGE-LOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

https://chromium.googlesource.com/chromium/src/+log/9ede2cde5727eecdb377b57b32c5226d1d41c8ce..5971e47dc08dbb773f58fd6fb13b1df7917fd295

Suspect: https://chromium.googlesource.com/chromium/src/+/5971e47dc08dbb773f58fd6fb13b1df7917fd295

aelias@:Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

I'm getting a similar issue:

title: "scrolling only works in one scrollable area when multiple are present"

1) Chromebook Pixel 2

2) Google Chrome        65.0.3325.209 (Official Build) (64-bit)
Revision        0
Platform        10323.67.0 (Official Build) stable-channel samus
Firmware Version        Google_Samus.6300.276.0
ARC     4691291
JavaScript      V8 6.5.254.43
Flash   29.0.0.125 /run/imageloader/PepperFlashPlayer/libpepflashplayer.so
User Agent      Mozilla/5.0 (X11; CrOS x86_64 10323.67.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.209 Safari/537.36
Command Line    /opt/google/chrome/chrome --ppapi-flash-path=/opt/google/chrome/pepper/libpepflashplayer.so --ppapi-flash-version=29.0.0.113 --ui-prioritize-in-gpu-process --use-gl=egl --enable-native-gpu-memory-buffers --gpu-sandbox-failures-fatal=yes --enable-logging --log-level=1 --use-cras --enable-wayland-server --user-data-dir=/home/chronos --max-unused-resource-memory-usage-percentage=5 --login-profile=user --enable-natural-scroll-default --has-chromeos-keyboard --guest-wallpaper-large=/usr/share/chromeos-assets/wallpaper/guest_large.jpg --guest-wallpaper-small=/usr/share/chromeos-assets/wallpaper/guest_small.jpg --child-wallpaper-large=/usr/share/chromeos-assets/wallpaper/child_large.jpg --child-wallpaper-small=/usr/share/chromeos-assets/wallpaper/child_small.jpg --default-wallpaper-large=/usr/share/chromeos-assets/wallpaper/default_large.jpg --default-wallpaper-small=/usr/share/chromeos-assets/wallpaper/default_small.jpg --enable-consumer-kiosk --arc-availability=officially-supported --arc-transition-migration-required --enterprise-enrollment-initial-modulus=15 --enterprise-enrollment-modulus-limit=19 --login-user=cwmorris@google.com --login-profile=a88f988148eba87e48bb79f210e83c5b52ea8698 --flag-switches-begin --flag-switches-end --isolate-origins=https://appspot.com/,https://chromium.org/,https://googleapis.com/,https://googleplex.com/,https://googlesource.com/,https://youtube.com/,https://google.com/,https://withgoogle.com/,https://googleacquisitionmigration.com/,https://googleusercontent.com/,https://googleprod.com/,https://nest.com/,https://myworkday.com/,https://chromiumapp.org/,https://lucidchart.com/,https://service-now.com/,https://concursolutions.com/,https://salesforce.com/,https://gcorppartners.com/,https://morganstanley.com/,https://schwab.com/,https://qualtrics.com/,https://ultipro.com/,https://google.secure2-enroll.com/,https://googlegroups.com/,https://google.secure.force.com/,https://ebenefitsnow.com/,https://firebase.com/,https://elo.plusrelocation.com/,https://anthem.com/,https://g.viapeople.net/,https://gdjap.com/,https://asana.com/,https://perquisite.net/,https://postini.com/,https://perkhub.com/,https://gstave.us/,https://geolearning.com/,https://lecorpio.com/,https://inverify.net/,https://preceda.com.au/,https://secureacceptance.cybersource.com/,https://solium.com/,https://fgvms.com/,https://withgoogle.com/,https://ridecell.com/,https://tds.ie/,https://sprinklr.com/,https://smartsheet.com/,https://fieldglass.net/,https://dochub.com/ --vmodule=*arc/*=1,automatic_reboot_manager=1,tablet_power_button_controller=1,*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,*night_light*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2 --isolate-origins=https://appspot.com/,https://chromium.org/,https://googleapis.com/,https://googleplex.com/,https://googlesource.com/,https://youtube.com/,https://google.com/,https://withgoogle.com/,https://googleacquisitionmigration.com/,https://googleusercontent.com/,https://googleprod.com/,https://nest.com/,https://myworkday.com/,https://chromiumapp.org/,https://lucidchart.com/,https://service-now.com/,https://concursolutions.com/,https://salesforce.com/,https://gcorppartners.com/,https://morganstanley.com/,https://schwab.com/,https://qualtrics.com/,https://ultipro.com/,https://google.secure2-enroll.com/,https://googlegroups.com/,https://google.secure.force.com/,https://ebenefitsnow.com/,https://firebase.com/,https://elo.plusrelocation.com/,https://anthem.com/,https://g.viapeople.net/,https://gdjap.com/,https://asana.com/,https://perquisite.net/,https://postini.com/,https://perkhub.com/,https://gstave.us/,https://geolearning.com/,https://lecorpio.com/,https://inverify.net/,https://preceda.com.au/,https://secureacceptance.cybersource.com/,https://solium.com/,https://fgvms.com/,https://withgoogle.com/,https://ridecell.com/,https://tds.ie/,https://sprinklr.com/,https://smartsheet.com/,https://fieldglass.net/,https://dochub.com/
Executable Path /opt/google/chrome/chrome
Profile Path    /home/chronos/u-a88f988148eba87e48bb79f210e83c5b52ea8698
Variations      bd23585d-3f4a17df
6a89113b-ccb9a6a5
59aeb88e-3f4a17df
a6674cf-ca7d8d80
6345b824-3f4a17df
3095aa95-3f4a17df
d52c4ff7-d52c4ff7
47e5d3db-3d47f4f4
8f8b37c1-580d756a
9cfd95a0-ca7d8d80
4dc30737-b8a5ea08
7a7966ef-7a7966ef
79898f76-ca7d8d80
34d450b1-3f4a17df
98be3390-54f732d1
116c6887-65bced95
57f575bb-3d47f4f4
f347910c-65bced95
4b61504a-c9eb6633
937cad47-65bced95
9773d3bd-f23d1dea
8e3b2dc5-93702590
9e5c75f1-1039a221
c322f799-2dbe5f9
3de1fbf2-3d47f4f4
f79cb77b-3f4a17df
4ea303a6-ecbb250e
2b33233e-d8253d6f
72606c4f-3f4a17df
58a025e3-c2b41702
1bced4a3-90fa85cd
b2f0086-d6b26420
2d871858-3f4a17df
4bc337ce-69465896
9a2f4e5b-d226bfeb
1354da85-c7531228
494d8760-52325d43
3ac60855-3ec2a267
f296190c-48a2334a
4442aae2-e1cc0f14
ed1d377-e1cc0f14
12e17bc5-e1cc0f14
75f0f0a0-e1cc0f14
e2b18481-6754d7b7
e7e71889-e1cc0f14
34baa302-ae68ed72
f5fff3a2-ca7d8d80
98426e68-ca7d8d80
da4aaa01-4d2fac87

3) the content of the "Status" section of chrome://policy
Device policies
Enrollment domain:
google.com
Display domain:
google.com
Client ID:
add185b5-f4e9-41f7-ab52-56b796d1d769
Asset ID:
Not Specified
Assigned Location:
Not Specified
Directory API ID:
741abdb0-f098-40e3-aaed-36109c7be68c
Last fetched:
2 hours ago
Fetch interval:
1 day
Status:
Policy cache OK

4) steps to reproduce the problem

feedback filed at 2018-04-22 22:03 PST

There are multiple 'scrollable' areas when viewing my email at https://inbox.google.com:

1. the sidecar listing my bundles (also lists 'Inbox', 'Snoozed', 'Done', etc)
2. the area showing the actual emails in my Inbox

When using a bluetooth mouse, the scrollbar only works in #2. For #1, I have to click and drag the scroll bar in order to scroll.