groby/jdonnelly:

The suggestions text isn't supposed to overflow past the right-edge of the actual Omnibox right?

It doesn't on Views.

Equivalent screenshot on Views shows that it cuts off at the width of the actual omnibox on the right side.

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I agree the Views behavior seems more appropriate. I'll leave it to the Mac team to triage.

+shrike@ who has implemented MD for Mac.

Version with fix here: https://codereview.chromium.org/2927193002/

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Per offline discussion, I'm sending a CL to shrike@ to review based on his suggested fix.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7b56a5733a6ded284c245018071328dbb99aadb5

commit 7b56a5733a6ded284c245018071328dbb99aadb5
Author: tommycli <tommycli@chromium.org>
Date: Mon Jun 12 22:53:40 2017

Omnibox UI: Create right-margin on Cocoa dropdown

BUG= 729197 
TBR=groby@chromium.org

Review-Url: https://codereview.chromium.org/2927193002
Cr-Commit-Position: refs/heads/master@{#478801}

[modify] https://crrev.com/7b56a5733a6ded284c245018071328dbb99aadb5/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.h
[modify] https://crrev.com/7b56a5733a6ded284c245018071328dbb99aadb5/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
[modify] https://crrev.com/7b56a5733a6ded284c245018071328dbb99aadb5/chrome/browser/ui/cocoa/omnibox/omnibox_popup_matrix.h
[modify] https://crrev.com/7b56a5733a6ded284c245018071328dbb99aadb5/chrome/browser/ui/cocoa/omnibox/omnibox_popup_matrix.mm
[modify] https://crrev.com/7b56a5733a6ded284c245018071328dbb99aadb5/chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.mm

Tested this issue on Mac 10.12.5 using chrome dev # 61.0.3135.4 as per the steps mentioned in comment#0.

Observed that the suggestions are not getting overflowed to the right-edge of the Omnibox when user enter lengthy text which is more than the omnibox.
Hence adding TE Verified labels.

Please find the attached screencast for reference.
Thanks..!!

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