Tested on latest Chrome Stable #61.0.3163.100,  Canary # 63.0.3223.8 on Windows 10, Mac 10.12.6 and Ubuntu 14.04 and able to reproduce the issue.

This is a non-regression issue and able to reproduce from M-52 #52.0.2726.0. Marking it as untriaged so that issue gets addressed.

Attached the screencast for reference.

Thanks.

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I'll take a look.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/268fcfac4c28c0b5c3031c063bda6f0f96368c23

commit 268fcfac4c28c0b5c3031c063bda6f0f96368c23
Author: GauthamBanasandra <gautham.bangalore@gmail.com>
Date: Fri Aug 24 23:30:43 2018

DevTools: Show scriptResponseTime for ServiceWorker only if present

As per the browser protocol, the field scriptResponseTime is
optional. Hence adding a check to see if it present before
displaying it.

Bug:  767790 
Change-Id: I2638328aeec901419e48977ba40a15971da43f8b
Reviewed-on: https://chromium-review.googlesource.com/1180623
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586048}
[modify] https://crrev.com/268fcfac4c28c0b5c3031c063bda6f0f96368c23/third_party/blink/renderer/devtools/front_end/resources/ServiceWorkersView.js

Able to to reproduce the issue on Mac 10.13.6,Windows 10 and Ubuntu 17.10 using chrome 63.0.3223.8 build without fix.
Steps:
------
1. Launched chrome 
2. Opened Dev tools>> Application>> Service Workers 
As we are not seen date field on latest chrome 70.0.3534.0, attaching screen cast of latest chrome 70.0.3534.0 for reference.

pnangunoori@chromium.org@ - Could you please review the attached screen cast and please let us know if anything missed from our end. Also help in verifying the fix.

Thanks...!

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As per comment #5 CC'ing gautham.bangalore@gmail.com. Could you please review the attached screen cast and please let us know if anything missed from our end. Also help in verifying the fix.

Thanks..!

It seems to be working as expected. You might want to test it with multiple Service workers running.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7e27cfaca58d81d74a25460d2021592ce6174841

commit 7e27cfaca58d81d74a25460d2021592ce6174841
Author: John Abd-El-Malek <jam@chromium.org>
Date: Mon Aug 27 18:39:55 2018

Revert "DevTools: Show scriptResponseTime for ServiceWorker only if present"

This reverts commit 268fcfac4c28c0b5c3031c063bda6f0f96368c23.

Broke 

http/tests/devtools/service-workers/service-workers-redundant.js
http/tests/devtools/service-workers/service-workers-view.js

with network service
See 
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mojo%20Linux/17958

You can reproduce this locally via
--additional-driver-flag=--enable-features=NetworkService

Original change's description:
> DevTools: Show scriptResponseTime for ServiceWorker only if present
> 
> As per the browser protocol, the field scriptResponseTime is
> optional. Hence adding a check to see if it present before
> displaying it.
> 
> Bug:  767790 
> Change-Id: I2638328aeec901419e48977ba40a15971da43f8b
> Reviewed-on: https://chromium-review.googlesource.com/1180623
> Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#586048}

TBR=dgozman@chromium.org,lushnikov@chromium.org,pfeldman@chromium.org,gautham.bangalore@gmail.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  767790 
Change-Id: Idd1be72fe1bd5325263b8d46137edc07d70a4d22
Reviewed-on: https://chromium-review.googlesource.com/1191062
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586331}
[modify] https://crrev.com/7e27cfaca58d81d74a25460d2021592ce6174841/third_party/blink/renderer/devtools/front_end/resources/ServiceWorkersView.js

 Issue 891502  has been merged into this issue.

CL 1366370 effects:

before: image #1
after: image #2

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	Screen Shot 2018-12-06 at 14.50.37.png 23.5 KB View Download

Deleted: Screen Shot 2018-12-06 at 14.50.50.png 19.4 KB

	Screen Shot 2018-12-06 at 14.50.50.png 19.4 KB View Download

CL1376311 effects, same as above (CL1366370)

 Issue 857023  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0f242cca527636841032b152a3718a7f261ee11b

commit 0f242cca527636841032b152a3718a7f261ee11b
Author: Harley Li <hhli@chromium.org>
Date: Fri Dec 14 22:25:26 2018

[DevTools] Application > Service Workers, fix live script receiving time

Before this patch, current site's service worker receive time is Unix
epoch time. This patch fixes this problem.

About the test for this CL:
ServiceWorkerTestRunner.js is modified, so if the old problem (showing Unix epoch time)
persists, then DevTools tests service-workers-view.js and service-workers-redundant.js
would fail.

Bug:  767790 
Change-Id: I65aeadddcf03d381f8366e1157d85ac182202e15
Reviewed-on: https://chromium-review.googlesource.com/c/1376311
Commit-Queue: Haihong Li (Harley) <hhli@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616849}
[modify] https://crrev.com/0f242cca527636841032b152a3718a7f261ee11b/content/browser/service_worker/service_worker_new_script_loader.cc
[modify] https://crrev.com/0f242cca527636841032b152a3718a7f261ee11b/third_party/blink/renderer/devtools/front_end/application_test_runner/ServiceWorkersTestRunner.js

 Issue 916970  has been merged into this issue.