avc1_dot_codec    478 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc1_dot_codec(), kPrefixedClearKey));
avc1_dot_codec    654 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc1_dot_codec(), kExternalClearKey));
avc1_dot_codec    849 chrome/browser/media/encrypted_media_istypesupported_browsertest.cc       "video/mp4", avc1_dot_codec(), kWidevineAlpha));