Fixed r5373-related regressions in VideoFramesQueue::FrameToRecord()
Fixed r5373-related regressions in VideoFramesQueue::FrameToRecord()

R=henrike@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/20389004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: ceffdbc3715fd1e123d3a709ea35e34231b6752e

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc