Chrome Version : 66.0.3359.22 (Official Build) Revision	37c99647fccce6a8929b1ddebbcdfbe6148dea43-refs/branch-heads/3359@{#126} 32/64-bit
OS: Windows(7,8,8.1,10) ,Mac(10.12.6,10.13.1,10.13.4) and Linux(14.04).

What steps will reproduce the problem?
1. Launch Chrome, open DevTools and dock it to bottom.
2. Resize the DevTools window towards downwards and go to 'Audits' section.
3. Press 'Enter’ key from keyboard to open 'Audits to perform' overlay and observe.

Actual: Top border of 'Audits to perform' overlay is seems to be chopped.
Expected: Top border of 'Audits to perform' overlay should seen properly.

This is a regression issue, broken in M-66, below is manual regression range.

Good build: 66.0.3326.0
Bad build: 66.0.3327.0

Using the per-revision bisect providing the bisect results:

You are probably looking for a change made after 530738 (known good), but no later than 530739 (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/c773e5725d02c7a1cf9291a33360a5fb0a17cbe2..4b5ccf4611baea7e10cdac40715f2c6a7b2951a6

Suspecting: https://chromium.googlesource.com/chromium/src/+/4b5ccf4611baea7e10cdac40715f2c6a7b2951a6

@paulirish: 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.

NOTE: This issue is also reproducible on M-67 Canary (build # 67.0.3366.0).

Kindly review the attached screen-cast for reference.

Thank you.
 

Deleted: Actual behavior.mov 5.3 MB

	Actual behavior.mov 5.3 MB View Download

Deleted: Expected behavior.mov 1.8 MB

	Expected behavior.mov 1.8 MB View Download