Chrome Version: 64.0.3253.3 Revision d5f4ba12a6c29b1b49da50663e51d7d6d2dad88e-refs/branch-heads/3253@{#5}(32/64bit)
OS: Windows (7,8,10),Linux (14.04 LTS),Mac OS X(10.12.6,10.13.1)

What steps will reproduce the problem?
(1) Launch chrome, navigate to chrome://dino
(2) Resize browser window and hitt Enter key, observe left side of the page.

Actual: Unwanted glimpse of text is seen after hitting Enter key.

Expected: No such a glimpse should seen.

This is a regression issue, broken in 'M61' , below is bisect info:

Good Build: 61.0.3154.0
Bad Build: 61.0.3155.0

You are probably looking for a change made after 485575 (known good), but no later than 485576 (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/8909a54471f168be1300c13aaecd2a2985e960ad..5d7f712b4d54e0127f78f8529046db80b2c1a975

suspect:https://chromium.googlesource.com/chromium/src/+/5d7f712b4d54e0127f78f8529046db80b2c1a975
 

Deleted: Actual_Video.mov 3.3 MB

Actual_Video.mov 3.3 MB Download

Deleted: Expected_Video.mov 1.6 MB

Expected_Video.mov 1.6 MB Download