GitLab

Per chromium style guide we should not be DCHECK'ing handled cases;
these cases must be handled in release builds and thus should not
have special handling in debug mode.

BUG=868695
TEST=none

Change-Id: I1c17d5c2aadeda43fcc4193746623edaadae45e6
Reviewed-on: https://chromium-review.googlesource.com/1155825Reviewed-by: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579260}