DOC_TYPE_NONE     462 net/base/mime_sniffer.cc   OfficeDocType type = DOC_TYPE_NONE;
DOC_TYPE_NONE     479 net/base/mime_sniffer.cc   if (type == DOC_TYPE_NONE)
DOC_TYPE_NONE     493 net/base/mime_sniffer.cc       case DOC_TYPE_NONE:
DOC_TYPE_NONE     511 net/base/mime_sniffer.cc       case DOC_TYPE_NONE: