service worker: Small cleanups in ServiceWorkerNavigationLoader.

* Remove FallbackToRenderer as CORS isn't needed for navigations.
* Remove ssl_info_ as it's only needed locally in one function.
* Remove FailDueToLostController as it only happens for subresources.

Bug: 715640
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I6aab83459f4f60b078efd4c2c8ad1ddb0dca0500
Reviewed-on: https://chromium-review.googlesource.com/1094845
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566279}
3 files changed