Chrome Version: 69.0.3450.0 (Official Build) Revision da8f5906ed311a5cade0d00faa8c16c9d7816b22-refs/branch-heads/3450@{#1}(64 bit)
OS: Mac 10.12.6

Pre-condition: Enable 'Use Views browser windows instead of Cocoa.' under chrome://flags

Extension URL: https://chrome.google.com/webstore/detail/google-hangouts/nckgahadagoaajjgafhacjanaoiihapd?utm_source=chrome-ntp-icon

What steps will reproduce the problem?
(1) Launch chrome, navigate to the above given extension URL and add 'Google Hangouts' extension to chrome.
(2) Click on the hangout extension icon besides omnibox to open Hangout window and observe the header.

Actual Result: The header on 'Google Hangouts' extension window appears chopped.
Expected Result: The header on 'Google Hangouts' extension window should be seen properly.

This is regression issue broken in ‘M-69’, below is the manual bisect info:
Good build: 69.0.3447.0(Revision: 563479)
Bad build : 69.0.3448.0(Revision: 563958)

Unable to provide bisect using per-revision script,hence re-bisected with old script: 

Narrow Bisect info : 

https://chromium.googlesource.com/chromium/src/+log/363d153b234835ab85f648015bf4622677b31bd2..b93dd4ecb95865180ee65d3f8342ea5abda6d478?pretty=fuller&n=10000 

Suspect: https://chromium.googlesource.com/chromium/src/+/07a1071502f4699d445d0b7f46f3ca27d10efef0 

@sdy: Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note: This issue is not seen on Windows(7,8,8.1,10), Mac(10.13.1, 10.13.6)and Linux(14.04) OS.

Thank You!

 

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	ActualVideo.mov 5.1 MB View Download

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	ExpectedVideo.mov 6.3 MB View Download