It might not have to do with service workers.

The original bug was the "externalfile:" URL redirected to a Google Docs page. The page loaded and tried to register a service worker, and registration failed.

However in this case the page itself totally doesn't open with a "Google Chrome OS can't open this page" error. It seems to occur before any redirect.

Maybe the problem is just that NetworkService and externalfile URLs aren't working well? Resetting this to Untriaged.

There are two bugs.

- When ServiceWorkerServicification is on (but NetworkService is off), you can navigate to the page but any Service Worker related API will fail with an exception. This was the original issue in the non-servicification path fixed by https://chromium-review.googlesource.com/c/chromium/src/+/861558.
- When NetworkService is on, you cannot navigate to the page.

I can fix the first issue by doing the same thing as the linked CL in the servicification path, but it doesn't fix the second issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c2997950ca4bf61f062e4efef8909feadfe9d911

commit c2997950ca4bf61f062e4efef8909feadfe9d911
Author: Matt Falkenhagen <falken@chromium.org>
Date: Wed Oct 17 10:08:40 2018

S13nServiceWorker: Make the provider host for externalfile scheme navigations.

This fixes ServiceWorkerRequestHandlerTest.InitializeForNavigation_ExternalFileScheme
when ServiceWorkerServicification or NetworkService is enabled.

It's the same fix as the non-servicification path, done in r528590.

Bug:  895187 , 896157 
Change-Id: I8949c0bf002b329a01b1755913d16634dd80e7cd
Reviewed-on: https://chromium-review.googlesource.com/c/1286021
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600336}
[modify] https://crrev.com/c2997950ca4bf61f062e4efef8909feadfe9d911/content/browser/service_worker/service_worker_request_handler.cc

This is a simple fix for a bug when ServiceWorkerServicification is on.

Your change meets the bar and is auto-approved for M71. Please go ahead and merge the CL to branch 3578 manually. Please contact milestone owner if you have questions.
Owners: benmason@(Android), kariahda@(iOS), kbleicher@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4467858024735cdf0091ef6d12b835fdb305c00f

commit 4467858024735cdf0091ef6d12b835fdb305c00f
Author: Matt Falkenhagen <falken@chromium.org>
Date: Wed Oct 24 15:34:23 2018

M71: S13nServiceWorker: Make the provider host for externalfile scheme navigations.

This fixes ServiceWorkerRequestHandlerTest.InitializeForNavigation_ExternalFileScheme
when ServiceWorkerServicification or NetworkService is enabled.

It's the same fix as the non-servicification path, done in r528590.

Bug:  895187 , 896157 
Change-Id: I8949c0bf002b329a01b1755913d16634dd80e7cd
Reviewed-on: https://chromium-review.googlesource.com/c/1286021
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#600336}(cherry picked from commit c2997950ca4bf61f062e4efef8909feadfe9d911)
Reviewed-on: https://chromium-review.googlesource.com/c/1297147
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/branch-heads/3578@{#291}
Cr-Branched-From: 4226ddf99103e493d7afb23a4c7902ee496108b6-refs/heads/master@{#599034}
[modify] https://crrev.com/4467858024735cdf0091ef6d12b835fdb305c00f/content/browser/service_worker/service_worker_request_handler.cc

The following revision refers to this bug: 
https://chromium.googlesource.com/chromium/src.git/+/4467858024735cdf0091ef6d12b835fdb305c00f

Commit: 4467858024735cdf0091ef6d12b835fdb305c00f
Author: falken@chromium.org
Commiter: falken@chromium.org
Date: 2018-10-24 15:34:23 +0000 UTC

M71: S13nServiceWorker: Make the provider host for externalfile scheme navigations.

This fixes ServiceWorkerRequestHandlerTest.InitializeForNavigation_ExternalFileScheme
when ServiceWorkerServicification or NetworkService is enabled.

It's the same fix as the non-servicification path, done in r528590.

Bug:  895187 , 896157 
Change-Id: I8949c0bf002b329a01b1755913d16634dd80e7cd
Reviewed-on: https://chromium-review.googlesource.com/c/1286021
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#600336}(cherry picked from commit c2997950ca4bf61f062e4efef8909feadfe9d911)
Reviewed-on: https://chromium-review.googlesource.com/c/1297147
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/branch-heads/3578@{#291}
Cr-Branched-From: 4226ddf99103e493d7afb23a4c7902ee496108b6-refs/heads/master@{#599034}

The part of the bug about service worker API calls failing is fixed.

To reduce noise I'll close this bug and open a new one for "Can't open Google Drive files from Files app" which is, I believe, far more serious.

Meant to change the summary in c#11 to reflect what was fixed.

The bug for "Can't open Google Drive files from Files app" is  issue 898517 .