avc3_extended_codec  474 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc3_extended_codec(), kPrefixedClearKey));
avc3_extended_codec  650 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc3_extended_codec(), kExternalClearKey));
avc3_extended_codec  845 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc3_extended_codec(), kWidevineAlpha));