Chrome Version:64.0.3282.140 (Official Build) Revision a06bc1d5e8e285c70078802de990c1719ccc75e8-refs/branch-heads/3282@{#631} (64 Bit) 
OS: Mac(10,12,6, 10.13.1, 10.13.3) 

Steps to reproduce:
1. Launch chrome , open NTP and navigate to chrome://apps/
2. Now open find in page by pressing Ctrl+f ,click on sign in link on page and observe.
 
Actual: Unnecessary focus stays in find in page even after opening sign in to chrome overlay.
Expected: Focus should be transfer to find in page  after opening sign in to chrome overlay.

This is Regression issue broken in 'M-64' and Using the per-revision bisect providing the bisect results,

Good Build:64.0.3257.0
Bad Build:64.0.3258.0

You are probably looking for a change made after 513738 (known good), but no later than 513739 (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/713a241ec443ad429e820671014d77a5b856d795..a6efbff97cb449cb39de43c7721a4bb70c753560

Suspect: https://chromium.googlesource.com/chromium/src/+/a6efbff97cb449cb39de43c7721a4bb70c753560
 
msarda@: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.Issue is also seen on M-64 Beta (Build #64.0.3282.119), M-65 Dev(Build #65.0.3325.31) and M-66 (Build #66.0.3336.0)                                  
2.Issue is not seen on Windows(7,8,8.1,10) and Linux(14.04 LTS)

Kindly refer attached screen cast 
 

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	Actual_result.mov 2.3 MB View Download

Deleted: Expected_result.mov 2.0 MB

	Expected_result.mov 2.0 MB View Download