Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
Pro tip: If your function takes a StringBuilder by value, it doesn't
actually append anything to the caller's StringBuilder. On the plus
side, I probably won't make this mistake for a while? I hope?
This implements these algorithms from the CSSOM-1 spec:
- serialize a string
- serialize a URL
Also, we now have two versions of each of the serialization functions:
One that returns a String as before, and the other that takes a
StringBuilder to write into. This saves creating extra StringBuilders
when they are not needed. :^)
This is the `CSS` namespace defined in IDL here:
https://www.w3.org/TR/cssom-1/#namespacedef-css , not to be confused
with our `Web::CSS` namespace. Words are hard.
`CSS.escape()` lets you escape identifiers that can then be used to
create a CSS string.
I've also stubbed out the `CSS.supports()` function.
