getRegionById     322 Source/core/html/track/TextTrack.cpp     VTTRegion* existingRegion = regionList->getRegionById(region->id());
getRegionById     763 Source/core/html/track/vtt/VTTCue.cpp         VTTRegion* region = track()->regions()->getRegionById(m_regionId);
getRegionById     776 Source/core/html/track/vtt/VTTCue.cpp         region = track()->regions()->getRegionById(regionId());
getRegionById      48 Source/core/html/track/vtt/VTTRegionList.h     VTTRegion* getRegionById(const String&) const;