Auto merge of #27697 - ghostd:stylesheet-media, r=<try>

Implements StyleSheet.media

<!-- Please describe your changes on the following line: -->

---
<!-- 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` does not report any errors
- [ ] These changes fix #___ (GitHub issue number if applicable)

<!-- Either: -->
- [x] There are tests for these changes OR
- [ ] These changes do not require tests because ___

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

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

components/script/dom/cssstylesheet.rs

@@ -10,6 +10,7 @@ use crate::dom::bindings::root::{DomRoot, MutNullableDom};
 use crate::dom::bindings::str::DOMString;
 use crate::dom::cssrulelist::{CSSRuleList, RulesSource};
 use crate::dom::element::Element;
+use crate::dom::medialist::MediaList;
 use crate::dom::node::{stylesheets_owner_from_node, Node};
 use crate::dom::stylesheet::StyleSheet;
 use crate::dom::window::Window;
@@ -100,6 +101,14 @@ impl CSSStyleSheet {
     pub fn set_origin_clean(&self, origin_clean: bool) {
         self.origin_clean.set(origin_clean);
     }
+
+    pub fn medialist(&self) -> DomRoot<MediaList> {
+        MediaList::new(
+            self.global().as_window(),
+            self,
+            self.style_stylesheet().media.clone(),
+        )
+    }
 }
 
 impl CSSStyleSheetMethods for CSSStyleSheet {

components/script/dom/stylesheet.rs

@@ -9,6 +9,7 @@ use crate::dom::bindings::root::DomRoot;
 use crate::dom::bindings::str::DOMString;
 use crate::dom::cssstylesheet::CSSStyleSheet;
 use crate::dom::element::Element;
+use crate::dom::medialist::MediaList;
 use dom_struct::dom_struct;
 
 #[dom_struct]
@@ -51,6 +52,11 @@ impl StyleSheetMethods for StyleSheet {
         self.downcast::<CSSStyleSheet>().and_then(|s| s.get_owner())
     }
 
+    // https://drafts.csswg.org/cssom/#dom-stylesheet-media
+    fn Media(&self) -> DomRoot<MediaList> {
+        self.downcast::<CSSStyleSheet>().unwrap().medialist()
+    }
+
     // https://drafts.csswg.org/cssom/#dom-stylesheet-title
     fn GetTitle(&self) -> Option<DOMString> {
         self.title.clone()

components/script/dom/webidls/StyleSheet.webidl

@@ -12,7 +12,7 @@ interface StyleSheet {
   // readonly attribute StyleSheet? parentStyleSheet;
   readonly attribute DOMString? title;
 
-  // [SameObject, PutForwards=mediaText] readonly attribute MediaList media;
+  [SameObject, PutForwards=mediaText] readonly attribute MediaList media;
   attribute boolean disabled;
 };