Chrome Version: 64.0.3260.2 (Official Build)05d1d20e2db6d594b98fe87d7aa500f22aba70a6-refs/branch-heads/3260@{#3} 32/64-bit.
OS: Win(7,8,10), Linux(14.04 LTS).

What steps will reproduce the problem?
1. Freshly launch Chrome, open NTP and observe 'Change' link on First run bubble.

Underline is missing on Change link.
Underline should seen on Change link.

NOTE: More space is also observed between text 'Google' and 'Change' link on First run bubble.

This is a regression issue, broken in M-64 series, below is manual regression range.

Good build: 64.0.3256.0 
Bad build: 64.0.3257.0

You are probably looking for a change made after 513360 (known good), but no later than 513361 (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/a28eb737c4c9424d7656ada19b688af854777968..1eca7aba022c190ea02e34dbd4ae52a8f5f88bbc

Suspect: https://chromium.googlesource.com/chromium/src/+/1eca7aba022c190ea02e34dbd4ae52a8f5f88bbc

@tapted: 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 not seen on Mac OS.

Kindly review the attached screenshot for reference.
 

Deleted: First Run Bubble_Screenshot.png 11.1 KB

	First Run Bubble_Screenshot.png 11.1 KB View Download