Fix BrowsingInstance::GetSiteForURL() to use const GURL&.

Fixing a typo that accidentally got committed in
http://crrev.com/c/1582275.

Change-Id: I7ef67f002090c0ec091f093fce7a847c6e3b93cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584430
Auto-Submit: Aaron Colwell <acolwell@chromium.org>
Commit-Queue: Aaron Colwell <acolwell@chromium.org>
Commit-Queue: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654106}
2 files changed