Chrome Version: 72.0.3616.0 (Official Build) Revision	95ce71356251517776e712f9815217c46c767dcc-refs/branch-heads/3616@{#1} (64-bit)
OS:Mac(10.13.1 , 10.13.6 , 10.14.2) 

Steps to reproduce:
1. Launch chrome and download any file.
2. Observe the download icon (In download bar) while the download is still in progress.

Actual  : Download arrow icon is not seen while the download is still in progress.
Expected: Download arrow icon should be seen while the download is still in progress.

This is a regression issue broken in M-70 and below is the bisect information:
Good Build : 70.0.3503.0 (Revision : 578160)
Bad Build : 70.0.3504.0 (Revision : 578510)

You are probably looking for a change made after 578333 (known good), but no later than 578334 (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/bcb7db78edc13f57577f0a9562c98918bdcc10ae..67d21d10815fe6d87d1785a65a50fbc386e6605b

Suspect : https://chromium.googlesource.com/chromium/src/+/67d21d10815fe6d87d1785a65a50fbc386e6605b

@Elly : 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 not reproducible in Windows(7,8,10) & Linux(14.04 LTS) OS.
2.Issue is also seen on M-70 Stable (build #70.0.3538.110), M-71 Beta (build #71.0.3578.62) and M-72 Dev (build #72.0.3610.2).

Kindly refer the attached screen-cast.

Thank You..!
 

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