Chromecast buildfix: updates BrowserCdmFactory for new API.

See: https://codereview.chromium.org/850183002/

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

Review URL: https://codereview.chromium.org/861153004

Cr-Commit-Position: refs/heads/master@{#312444}
3 files changed