Use rtc::scoped_refptr for WebRtcVideoCapturer.
Un-breaks peerconnection_client which would instantly use-after-free on
an allocated VCM because it wasn't building a scoped_refptr so all
references to the VCM were dropped.
BUG=webrtc:5229
TBR=tommi@webrtc.org
TEST=Run peerconnection_client locally, verify that there's no crash.
Review URL: https://codereview.webrtc.org/1817953005 .
Cr-Original-Commit-Position: refs/heads/master@{#12088}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 09c3a1e291ed5a59d9c6f54b9ea5a7c2e2acec5c
4 files changed
