NetS13nServiceWorker: Disable irrelevant interceptor test.

Skip ServiceWorkerNavigationPreloadTest.CanceledByInterceptor.

This test is about ResourceDispatcherHost interceptors and doesn't apply
to the NetworkService world.

Bug: 715640
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I6a33bff304c2add06a06f80882ba7fe695b946b7
Reviewed-on: https://chromium-review.googlesource.com/1092613
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565919}
2 files changed