AppCache: Simplify AppCacheBackendImpl::RegisterHost checks.

Bug: 611938
Change-Id: I5231a54ef35fc2aee6d36e83d65b1674df58cbd0
Reviewed-on: https://chromium-review.googlesource.com/c/1462425
Commit-Queue: Victor Costan <pwnall@chromium.org>
Auto-Submit: Staphany Park <staphany@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630691}
1 file changed