Mark WebFont.CORSSuccess histogram obsolete

We don't check this histogram anymore.

Bug: 975909
Change-Id: Ief5df0b105fcf43da3068a85ffdc66851e079eb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1663229
Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670806}
2 files changed