Chrome Version: 63.0.3219.0 (Official Build) 67ae3f5d8124e37b0fb71995bef29c9bd31ee9f4-refs/heads/master@{#502728} 32/64-bit.
OS: Windows-10

What steps will reproduce the problem?
1. Launch chrome and open Incognito window.
2. Resize the Incognito window to it's extreme left.
3. Now, click on tabstrip to open new tab and observe.

Unnecessary tabstrip gets blank.
Tabstrip should not get blank.

This is a Windows-10 specific regression issue, broken in M-54 series, below is manual regression range.

Good build: 54.0.2824.0 
Bad build: 54.0.2825.0

You are probably looking for a change made after 410522 (known good), but no later than 410531 (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/c81e43b82548d619a0b8ebd4dfd2362a8bbf5e2a..f1be9cb7381c2c9dc567045198f3e7e16693be71

Suspect: r527629 ?

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

Note: This issue is not seen on Windows(7,8), Mac(10.12.6) and Linux OS.

Kindly review the attached screencast for reference.
 

Deleted: Tabstrip_Screenshot.png 13.3 KB

	Tabstrip_Screenshot.png 13.3 KB View Download

Deleted: Actual behavior.mp4 669 KB

	Actual behavior.mp4 669 KB View Download

Deleted: Expected behavior.mp4 761 KB

	Expected behavior.mp4 761 KB View Download