change FileSystemURL to use url::Origin

There are no functional changes.

Bug: 598424
Change-Id: Ib8f6aafb34b137b8d9ec5c8672d2f8c17e32e238
Reviewed-on: https://chromium-review.googlesource.com/c/1436406
Commit-Queue: Erik Anderson <Erik.Anderson@microsoft.com>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Ɓukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628897}
63 files changed