closedCaptionTracksChanged 2269 Source/core/html/HTMLMediaElement.cpp mediaControls()->closedCaptionTracksChanged(); closedCaptionTracksChanged 2356 Source/core/html/HTMLMediaElement.cpp mediaControls()->closedCaptionTracksChanged(); closedCaptionTracksChanged 2550 Source/core/html/HTMLMediaElement.cpp mediaControls()->closedCaptionTracksChanged(); closedCaptionTracksChanged 62 Source/core/html/shadow/MediaControls.h void closedCaptionTracksChanged();