Chromecast buildfix: ClientCertificateDelegate changes.

See: https://codereview.chromium.org/859213006/

R=davidben@chromium.org,lcwu@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/999243002

Cr-Commit-Position: refs/heads/master@{#320201}
1 file changed