MAGIC_STRING      266 net/base/mime_sniffer.cc   MAGIC_STRING("text/html", "<" tag)
MAGIC_STRING      577 net/base/mime_sniffer.cc   MAGIC_STRING("application/xhtml+xml",
MAGIC_STRING      579 net/base/mime_sniffer.cc   MAGIC_STRING("application/atom+xml", "<feed")
MAGIC_STRING      580 net/base/mime_sniffer.cc   MAGIC_STRING("application/rss+xml", "<rss")  // UTF-8