A lot (and I mean, really a lot) depends on these constructors.
Therefore, this is the one spaghetti ball that I could extract and
convert all `can_gc` to `cx`. There are some new introductions of
`temp_cx` in the callbacks of the servo parser, but we already had some
in other callbacks.
Part of #40600
Testing: It compiles
Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
This adds the WebIDl and implementation for the HTMLMarqueeElement type.
The `<marquee>` HTML is now assigned this type.
None of the contained properties or methods are implemented yet.
Testing: Existing WPTs
Signed-off-by: Luke Warlow <lwarlow@igalia.com>
