Callback interface objects' (i.e. NodeFilter's) prototype is now Object instead of
Function and non-callback interface objects' their proper ancestor, starting with
the Function prototype.
The function do_create_interface_objects is removed in favour of 4 functions:
create_callback_interface_object, create_interface_prototype_object,
create_noncallback_interface_object and create_named_constructors.
While this increases the amount of codegen'd code, this greatly improves the
readability of the code involved in this part of DOM, instead of having one function
doing 4 different things. We can always find a more adequate abstraction later.
NativeProperties and everything related to the interface objects have been removed
from the utils module.
Fixes#2665.
Source-Repo: https://github.com/servo/servo
Source-Revision: e977a6e69a06ad69e87cc235b4ede60f8fb3eca3
b9abb88810