Using the per-revision bisect providing the bisect results,
Good build:61.0.3135.0(Revision:480321).
Bad build:61.0.3136.0(Revision:480665).

You are probably looking for a change made after 480556 (known good), but no later than 480557 (first known bad).

CHANGE-LOG URL:
---------------
https://chromium.googlesource.com/chromium/src/+log/436ccfe33a1747eb5e4d4b9ed948d498d560bf19..0e2afe148b2aea0aaef135379d01b1df986be46c

From the CL above, assigning the issue to the concern owner

@sunyunjia: Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Review-Url: https://codereview.chromium.org/2938373003
Note :Able to reproduce the issue in Win 10.0,Ubuntu 14.04 & Mac 10.12.3 and Able to reproduce in latest Canary #61.0.3159.0
Adding Release Block-Stable for this issue.Please remove if not the case.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/76e234ed8928315841951a5f170232e9c959633d

commit 76e234ed8928315841951a5f170232e9c959633d
Author: Sandra Sun <sunyunjia@chromium.org>
Date: Wed Jul 19 00:49:32 2017

Remove nextSelectedElement.reveal() in treeoutline.js

In dev-tools, the lighthouse generates a report after auditing a page.
The report contains several sections and should reveal both the relevant
section and the item as user navigates through the items in the left navigation
bar (see bug description).

In the current implementation, javascript executes
nextSelectedElement.reveal(), and nextSelectedElement.select(), where reveal()
scrolls the item into view after select() is executed to focus on the item then
scroll the section. However, the section has scroll-behavior:smooth, which
would be aborted by the immediate scrollIntoView called by reveal(). In fact,
in select(), we have already focused the item and have scrolled it into view,
so the reveal() function call is redundant, thus we remove them in this
patch to ensure the section can be scrolled into view smoothly. 

Bug:  744512 
Change-Id: I12813467862c466fcc7ad67ab3d0fc3eed9ef93f
Reviewed-on: https://chromium-review.googlesource.com/574659
Commit-Queue: Sandra Sun <sunyunjia@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487694}
[modify] https://crrev.com/76e234ed8928315841951a5f170232e9c959633d/third_party/WebKit/Source/devtools/front_end/ui/treeoutline.js

Rechecked this issue on Windows 10, Mac 10.11.6, Ubuntu 14.04 using chrome version 61.0.3163.13 and fix is working as expected. 

Note: Left panel is removed from build #61.0.3163.0

Attaching screen-cast for the same.

Deleted: 61.0.3163.13_behavior.mp4 891 KB

	61.0.3163.13_behavior.mp4 891 KB View Download