Unable to reproduce the issue on reported chrome version 66.0.3329.1 and on the latest canary 66.0.3334.0 using windows 7 with the below mentioned steps.
1. Launched Chrome
2. Navigated to chrome://welcome
3. After spinning of chrome logo we observed that there is no cut off/clip in the logo.
Attaching the screen shot of the same.

@Reporter: Could you please check the screenshot and let us know there is anything additional to be done in order to reproduce the issue. And please clarify us on the point no.3 of comment#0 about "tilt your monitor back".

Thanks!

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If you zoom into the top of the chromeball and look closely, then it is slightly cut off. You can also screenshot it, open it in paint, and fill the white with gray and see that the shadow is cut off on the top.

Thank you for providing more feedback. Adding requester "vamshi.kommuri@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Unable to reproduce this issue on reported version 66.0.3329.1 and on the latest canary 66.0.3339.0 with steps mentioned above. Attaching screencast for reference.

@Reporter: Please check the issue on latest canary and report us back the behaviour.

Thanks!

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	805293.png 116 KB View Download

Issue is still seen on latest canary 66.0.3340.0. The Chrome logo itself is not cut off, but the shadow around it is slightly cut off near the top of the Chrome logo. This can be seen by pressing Print Screen on the Chrome welcome page, opening Microsoft Paint, pressing Ctrl+V to paste the screenshot into Microsoft Paint, and using the fill tool to color the background of the Chrome welcome page gray.

Thank you for providing more feedback. Adding requester "sc00335628@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Able to reproduce this issue on latest canary version 66.0.3341.0 using Windows 10,Mac 10.13.3 and Ubuntu 14.04.i.e; Shadow around chrome logo is seen cut off as shown in screenshot of comment#0.

This issue is seen from M-60. Hence considering this issue as Non-Regression and marking as Untriaged. 

Thanks!

 Issue 869841  has been merged into this issue.

A solution from merged  issue 869841 :

remove "overflow-y: hidden;" @ https://cs.chromium.org/chromium/src/chrome/browser/resources/welcome/welcome.html?sq=package:chromium&dr=C&l=108