Chrome Version : 64.0.3263.0 (Official Build) fd1e89557fa78a467061f732a8473fd863a89b1a-refs/heads/master@{#515052} 32/64-bit
OS : Windows(7,8,10), Linux(14.04 LTS), Mac(10.12.6)

What steps will reproduce the problem?
1. Launch chrome and navigate to chrome://settings/languages
2. Click on 'Language' row and hit 'Tab' key to bring focus on expand/collapse icon.
3. Now, click beside focus diameter (please refer attached screencast) and observe.

Actual Result : Nothing happens after clicking beside focus of Expand/Collapse icon.

Expected Result : Language section should expand/collapse after clicking beside focus, since a hand pointer is seen for entire 'Language' row.

This is a regression issue broken in ‘M-57’ and using the per-revision bisect providing the bisect results,
Good build : 57.0.2956.0 (Revision : 439389)
Bad build : 57.0.2957.0 (Revision : 439663)

You are probably looking for a change made after 439530 (known good), but no later than 439531 (first known bad).

CHANGELOG URL:
https://chromium.googlesource.com/chromium/src/+log/892cc67f12a599659ebd10c091ad3c1811e857ef..3b3d36ba882ca4a8c55a8be080d672abd83d5bea

Suspect : https://chromium.googlesource.com/chromium/src/+/3b3d36ba882ca4a8c55a8be080d672abd83d5bea

@stevenjb : 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.
 

Deleted: Actual_Settings.mp4 747 KB

	Actual_Settings.mp4 747 KB View Download

Deleted: Expected_Settings.mp4 909 KB

	Expected_Settings.mp4 909 KB View Download