Remove usage of webrtc::NativeHandle since is just adds an extra level of indirection.

BUG=1128
R=magjed@webrtc.org, pbos@webrtc.org
TBR=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/43999004

Cr-Commit-Position: refs/heads/master@{#8932}
14 files changed