Thanks, I suspect the problem here is we don't support controlling data or blob URL clients.

Note, the test tries to verify that data URL clients are not controlled since they get an opaque origin.  It seems like chrome should pass those.

I'm a bit surprised the test times out.  Maybe the local URL body for the frame:

const frameControllerText =
`<script>
  let t = navigator.serviceWorker.controller
        ? navigator.serviceWorker.controller.scriptURL
        : null;
  parent.postMessage({ data: t }, '*');
</` + `script>`;

Should have a try/catch so it can postMessage a failure on exception.  Something like:


const frameControllerText =
`<script>
  let t = null;
  try {
    if ( navigator.serviceWorker.controller) {
      t = navigator.serviceWorker.controller.scriptURL;
    }
  } catch (e) {
    t = e.message;
  } finally {
    parent.postMessage({ data: t }, '*');
  }
</` + `script>`

Interesting, thanks bkelly for pointing that out. Maybe it's not as a hard as I thought to get this test to work then.

I think it was partly that, but also the Blob is not setting a mimetype which chrome seems to be more strict about.  I have a change that makes chrome not time out.  I'll file a WPT PR for you to review.

https://github.com/w3c/web-platform-tests/pull/9365

Note, chrome mostly behaves as you would expect, but it *does* intercept a fetch() from a data URL iframe.  A bit surprising if it has an opaque origin.

> Note, chrome mostly behaves as you would expect, but it *does* intercept a fetch() from a data URL iframe.  A bit surprising if it has an opaque origin.

Oh, sorry.  Its intercepting the fetch() in a data URL worker.  I assume thats because its being treated as a subresource instead of a non-subresource request.

bkelly: Thanks for fixing the timeout!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/631176ab167fc8575eaec2f21db6028718c7389a

commit 631176ab167fc8575eaec2f21db6028718c7389a
Author: Matt Falkenhagen <falken@chromium.org>
Date: Tue Feb 06 06:56:17 2018

Gardening: local-url-inherit-controller.https.html no longer times out.

The time outs turned into assert failures in
https://github.com/w3c/web-platform-tests/pull/9365

TBR=shimazu

Bug: 807720
NOTRY: true
Change-Id: I1caba897521be0b87c4be03d403e88d62f6412de
Reviewed-on: https://chromium-review.googlesource.com/903026
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534647}
[modify] https://crrev.com/631176ab167fc8575eaec2f21db6028718c7389a/third_party/WebKit/LayoutTests/TestExpectations