Chrome Version: 54.0.2831.0 (Official Build) 4bb92a6392a2f8bdc5c6c1319690800748870f1c-refs/heads/master@{#412405} 32/64-bit.
OS: Mac (10.10.5, 10.11.5), Windows (7,8,10), Linux (14.04 LTS).

What steps will reproduce the problem?
1. Launch chrome and navigate to 'chrome://md-settings/autofill' page.
2. Click on 'Add credit card' button to open 'Add credit card' overlay.
3. Click to open year drop down list under 'Expiration date' section.
4. Now, press 'Esc' key from keyboard and observe.

On pressing the 'Esc' key, unnecessary 'Add credit card' overlay gets closed.
On pressing the 'Esc' key, only year drop down list should get closed.

This is a regression issue, broken in M-54 series, will soon update other info.

Good build: 54.0.2810.0 
Bad build: 54.0.2811.0

Narrow bisect:
https://chromium.googlesource.com/chromium/src/+log/63229c8439700d37c78d7d0db66b54d968e9becd..21e70f121e72154c9891b061e9724ef30e1aecb9?pretty=fuller&n=10

Suspecting: r408495 ?

Kindly help to reassign, if your changes are not related to this issue.

Kindly review the attached screen-cast for reference.
 

Deleted: Actual behavior.mp4 660 KB

	Actual behavior.mp4 660 KB View Download

Deleted: Expected behavior.mp4 280 KB

	Expected behavior.mp4 280 KB View Download