NO_CODECS         198 chrome/renderer/media/chrome_key_systems.cc     bool is_aac_supported = (supported_codecs & MP4_AAC) != NO_CODECS;
NO_CODECS         199 chrome/renderer/media/chrome_key_systems.cc     bool is_avc1_supported = (supported_codecs & MP4_AVC1) != NO_CODECS;
NO_CODECS         270 chrome/renderer/media/chrome_key_systems.cc   SupportedCodecs supported_codecs = NO_CODECS;