Rename RealtimeMediaSource::m_VideoFrameObservers to m_videoFrameObservers
Pull request: https://github.com/WebKit/WebKit/pull/2654
Committed 252730@main (d4a82d81f59c): <https://commits.webkit.org/252730@main> Reviewed commits have been landed. Closing PR #2654 and removing active labels.
<rdar://problem/97438185>