Chrome Version : 71.0.3578.62 (Official Build) Revision	b1fa6dee27746dd62414ffad95ea3a7acf51ef16-refs/branch-heads/3578@{#760} 64-bit
OS : Mac(10.13.1, 10.13.6, 10.14.2) OS

Test extension URL :https://chrome.google.com/webstore/search/finance%20toolbar?hl=en-US

What steps will reproduce the problem?
1. Launch chrome, add above mentioned extension to chrome.
2. Navigate to any webpage eg: www.wikipedia.org and enable the extension.
3. Observe 'finance toolbar' is seen on the webpage.
4. Now resize the browser window to the maximum from RHS.
5. Now press 'Ctrl+Cmd+F' to enter browser full screen mode and observe.

Actual Result   : Delay is seen in resizing toolbar on entering browser full screen.
Expected Result : Resizing of extension toolbar should be smooth on entering browser full screen.

This is a regression issue, broken in M-62 and providing the bisect per revision bisect script:
Good Build : 61.0.3163.0 (Revision : 488529)
Bad Build  : 62.0.3164.0 (Revision : 488823)

You are probably looking for a change made after 488686 (known good), but no later than 488687 (first known bad).

CHANGE-LOG 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/ec87aec251d5a4cf948c827fda3fe99f15b3275b..71aac2d2a2c3f52763834ea1a7b933702ba3b943

Suspect: https://chromium.googlesource.com/chromium/src/+/71aac2d2a2c3f52763834ea1a7b933702ba3b943

@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 : 
1. This is Mac specific issue.
2. Issue is also observed in Canary build #72.0.3616.0

 

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