stylo: Fix StyleSheetInner/Stylesheet mapping

The key of this patch is the split between Stylesheet and StylesheetContents.

Gecko will use StylesheetContents, which maps to a ServoStyleSheetInner.

1 files changed, 7 insertions, 1 deletions

diff --git a/components/script/dom/csskeyframesrule.rs b/components/script/dom/csskeyframesrule.rs
index 469f9b7d026..888f945caa7 100644
--- a/components/script/dom/csskeyframesrule.rs
+++ b/components/script/dom/csskeyframesrule.rs
@@ -82,7 +82,13 @@ impl CSSKeyframesRuleMethods for CSSKeyframesRule {
 
     // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-appendrule
     fn AppendRule(&self, rule: DOMString) {
-        let rule = Keyframe::parse(&rule, self.cssrule.parent_stylesheet().style_stylesheet());
+        let style_stylesheet = self.cssrule.parent_stylesheet().style_stylesheet();
+        let rule = Keyframe::parse(
+            &rule,
+            &style_stylesheet.contents,
+            &style_stylesheet.shared_lock
+        );
+
         if let Ok(rule) = rule {
             let mut guard = self.cssrule.shared_lock().write();
             self.keyframesrule.write_with(&mut guard).keyframes.push(rule);