Turn ResourceFetcher type CHECK to DCHECK

A long-standing CHECK for type mismatches doesn't show up on our crash
logs, so turning it to a DCHECK.

Bug: 690632
Change-Id: I6fffe3c3e0fea88f0437cfc218c3aa46ed2de3ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619901
Reviewed-by: Dominic Farolino <domfarolino@gmail.com>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Commit-Queue: Yoav Weiss <yoavweiss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661399}
1 file changed