You are probably looking for a change made after 527616 (known good), but no later than 527617 (first known bad).
CHANGELOG 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/e50425bed92b9a78403abfceeefe269f44cb92c7..f1b8b41f59422b2de372cb39ed37b3b46c11c0cb

Suspecting: https://chromium.googlesource.com/chromium/src/+/f1b8b41f59422b2de372cb39ed37b3b46c11c0cb

@ellyjones: 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.

The behavior in the "actual" video looks like the behavior before <https://chromium-review.googlesource.com/c/chromium/src/+/852377>, but that CL landed 3 days before this bug was filed, so I'm a bit puzzled.

Reporter, can you re-test this please?

With response to comment #3:
Rechecked again and above issue is still reproducible on latest canary version 65.0.3322.3(Official Build) on Mac OS X(10.12.6,10.13.1,10.13.3),Win(7,8,8.1,10) & Linux(14.04 LTS) OS as well.

Please refer attached screen-cast.

Deleted: Actual_folder.mp4 395 KB

	Actual_folder.mp4 395 KB View Download

Ah, okay, I see what the issue is. Here's the fix: <https://chromium-review.googlesource.com/c/chromium/src/+/870751>

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f81dbbb30c4b054059502682325551d278b251be

commit f81dbbb30c4b054059502682325551d278b251be
Author: Elly Fong-Jones <ellyjones@chromium.org>
Date: Wed Jan 17 20:35:00 2018

views: use interior padding in treeview edit field

In f1b8b41f, TreeView's Textfield for editing lost the default Harmony
focus ring and gained a fixed 1pt border. However, that change lost
the interior padding on the Textfield, so the text runs directly into
the border ring.

Bug:  801096 
Change-Id: Ic078c3ae17964c7929e903f2e6665303be1188ad
Reviewed-on: https://chromium-review.googlesource.com/870751
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529861}
[modify] https://crrev.com/f81dbbb30c4b054059502682325551d278b251be/ui/views/controls/tree/tree_view.cc

Update : 
Verified this issue on Windows (7,8,8.1,10),Mac OS(10.12.6,10.13.1,10.13.3)& Linux (14.04 LTS) OS with latest canary version #65.0.3324.0(Official build) and the issue is fixed.Kindly refer attached screen-cast.

Thank you!