With this change, we now have ~1200 CellAllocators across both LibJS and
LibWeb in a normal WebContent instance.
This gives us a minimum heap size of 4.7 MiB in the scenario where we
only have one cell allocated per type. Of course, in practice there will
be many more of each type, so the effective overhead is quite a bit
smaller than that in practice.
I left a few types unconverted to this mechanism because I got tired of
doing this. :^)
Window.h is a rather heavy file, so let's try not to include it in
header files when we can!
Element.h now also includes LibWeb/Bindings/Intrinsics.h, but that's
just out of my laziness. Most if not all objects call
`Bindings::ensure_web_prototype<>()` anyway, so I don't think we would
gain much by sticking the header to source files instead.
The potentially scroll/focus and finish AOs are called by the inner
navigate event firing algorithm. Implement them beforehand to make the
diff look pretty :^).
Every property in an IDL dictionary is implied to be optional, unless it
is marked as required. If a dictionary is passed to a method with
optional, but it has at least one required or defaulted member, the
bindings will skip the optionality of the parameter and always pass a
struct with the required parameters filled in.
This event is the star of the show, and the main way that web content
can react to either programmatic or user-initiated navigation.
All of the fun algorithms will have to come later though.
