[ServiceWorker] Add -expected.txt file for fetch-request-xhr.https.html

Currently fetch-request-xhr.https.html is marked as [ Failure Timeout ],
but actually it always fails because of crbug.com/595993:
Chrome is not conforming to the spec
https://fetch.spec.whatwg.org/#fetching in that it generates the
following headers before SW:
  - User-Agent
  - Origin

This CL removes fetch-request-xhr.https.html from TestExpectations file
and adds corresponding -expected.txt for it.

BUG=658997
TEST=blink_tests
external/wpt/service-workers/service-worker/fetch-request-xhr.https.html

Change-Id: I53cc377a8db6cf8c06a6bca2d54c8d0359b2bbd7
Reviewed-on: https://chromium-review.googlesource.com/538080
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Han Leon <leon.han@intel.com>
Cr-Commit-Position: refs/heads/master@{#480002}
2 files changed