Auto merge of #11287 - heycam:moz-binding, r=bholley

Support -moz-binding in geckolib

Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data:
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy --faster` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

Either:
- [ ] There are tests for these changes OR
- [x] These changes do not require tests because changes target stylo

Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process.

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components/script/dom/htmlstyleelement.rs

@@ -18,6 +18,7 @@ use layout_interface::{LayoutChan, Msg};
 use std::sync::Arc;
 use string_cache::Atom;
 use style::media_queries::parse_media_query_list;
+use style::parser::ParserContextExtraData;
 use style::servo::Stylesheet;
 use style::stylesheets::Origin;
 
@@ -60,7 +61,8 @@ impl HTMLStyleElement {
         };
 
         let data = node.GetTextContent().expect("Element.textContent must be a string");
-        let mut sheet = Stylesheet::from_str(&data, url, Origin::Author, win.css_error_reporter());
+        let mut sheet = Stylesheet::from_str(&data, url, Origin::Author, win.css_error_reporter(),
+                                             ParserContextExtraData::default());
         let mut css_parser = CssParser::new(&mq_str);
         let media = parse_media_query_list(&mut css_parser);
         sheet.set_media(Some(media));