GetOptional       180 content/renderer/media/mock_media_stream_dependency_factory.cc       optional_constraints_(constraints->GetOptional()),
GetOptional        52 content/renderer/media/peer_connection_tracker.cc   MediaConstraintsInterface::Constraints optional = constraints.GetOptional();
GetOptional        29 content/renderer/media/rtc_media_constraints.h   virtual const Constraints& GetOptional() const OVERRIDE;