Manual bisect
Good build: 53.0.2778.0
Bad build: 53.0.2780.0

Narrow bisect URL:
https://chromium.googlesource.com/chromium/src/+log/f835a7953bb00d8fe7034f7d1076a6b4996fc605..18f5a46af8dcde2ae88873d03d2908949678af75?pretty=fuller&n=50

Suspecting: r402011

Note: Issue is reproducible on Mac OS (10.10.5, 10.11.4) and Linux OS (14.04 LTS)

Deleted: animation_actual.mp4 550 KB

	animation_actual.mp4 550 KB View Download

Deleted: animation_expected.mp4 217 KB

	animation_expected.mp4 217 KB View Download

Adding RB label as this is a recent regression.

What animation is not smooth ? I don't see much difference between the two videos. 

With response to comment #3: On pressing Tab key, delay is seen when Person 1 profile pops up.

Do not observe any animation difference on the profiles upon pressed Tab on Win 7 and Mac 10.11.5 using latest canary 54.0.2787.0.Removing the ReleaseBlock-stable as of now, feel free to add it again if you see the issue.

vvishwakarma@ : Please review the attached screen cast and update your observations.

Deleted: 623863_July_4.mp4 566 KB

	623863_July_4.mp4 566 KB View Download

Moving this nonessential bug to the next milestone.

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

With response to comment #5: Issue is reproducible on latest Chrome version: 54.0.2788.0. In the screen cast attached in comment # 5, 'Enable Material Design User Manager' flag is enabled. To reproduce the issue, disable 'Enable Material Design User Manager' flag from 'chrome://flags' and follow the steps mentioned in the bug. 

Able to reproduce the issue on mac 10.11.5 and win8.1 chrome version 54.0.2816.0 - pressing Tab key animation is not smooth for added user profiles

please find the screencast

jaydasika@, Could you please provide an update on this 

Deleted: 623863.mov 10.8 MB

623863.mov 10.8 MB Download

Friendly ping to get an update on this issue.

My CL is most likely not the cause for this. I have run the steps mentioned in the bug and it is not touching the code changed by my CL.

Still able to reproduce the issue on mac 10.11.6 chrome version 55.0.2872.0

Could someone look into this please

User manager is implemented in a web machinery (see user_manager_ui.cc)
Suspecting https://codereview.chromium.org/2027683003 (r402017)
Feel free to reassign.

vvishwakarma@ - Can you confirm that this still exists on the lastest build?

I can't really tell the difference. It might have been fixed by
https://codereview.chromium.org/2365943002/.

With response to comment #15: Issue is not seen on latest Canary #56.0.2905.0 and is working as intended.