The CSS3 property "text-decoration-style" accepts the following values: "solid | double | dotted | dashed | wavy" as seen on the link below:
All values except "wavy" were already supported on CG due to previous usage on "border-style" property:
This bug intends to provide CG platform support for "wavy" value (already parsed for "text-decoration-style" in bug 90958).
Fixed in bug 92868. Closing bug.