Some WebIDL methods, attributes and dictionary members are named with
Rust keywords such as `type`, `use` and `continue`. Using those
identifiers directly in the generated Rust code would cause compilation
errors.
The code generator already addresses this issue for attributes and
dictionary members by adding a `_` suffix to the conflicting
identifiers, but does not yet apply the same treatment to methods. This
patch extends the handling to methods as well.
Fixes: #39286
Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>
e3818a33c0