Get SMIL override styles from Gecko

components/style/gecko/wrapper.rs

@@ -38,6 +38,7 @@ use gecko_bindings::bindings::Gecko_ElementHasCSSTransitions;
 use gecko_bindings::bindings::Gecko_GetAnimationRule;
 use gecko_bindings::bindings::Gecko_GetExtraContentStyleDeclarations;
 use gecko_bindings::bindings::Gecko_GetHTMLPresentationAttrDeclarationBlock;
+use gecko_bindings::bindings::Gecko_GetSMILOverrideDeclarationBlock;
 use gecko_bindings::bindings::Gecko_GetStyleAttrDeclarationBlock;
 use gecko_bindings::bindings::Gecko_GetStyleContext;
 use gecko_bindings::bindings::Gecko_IsSignificantChild;
@@ -525,6 +526,11 @@ impl<'le> TElement for GeckoElement<'le> {
         declarations.map(|s| s.as_arc_opt()).unwrap_or(None)
     }
 
+    fn get_smil_override(&self) -> Option<&Arc<Locked<PropertyDeclarationBlock>>> {
+        let declarations = unsafe { Gecko_GetSMILOverrideDeclarationBlock(self.0) };
+        declarations.map(|s| s.as_arc_opt()).unwrap_or(None)
+    }
+
     fn get_animation_rules(&self, pseudo: Option<&PseudoElement>) -> AnimationRules {
         AnimationRules(self.get_animation_rule(pseudo),
                        self.get_transition_rule(pseudo))

components/style/gecko_bindings/bindings.rs

@@ -623,6 +623,11 @@ extern "C" {
                                       RawServoAnimationValueMapBorrowed)
      -> bool;
 }
+extern "C" {
+    pub fn Gecko_GetSMILOverrideDeclarationBlock(element:
+                                                     RawGeckoElementBorrowed)
+     -> RawServoDeclarationBlockStrongBorrowedOrNull;
+}
 extern "C" {
     pub fn Gecko_StyleAnimationsEquals(arg1:
                                            RawGeckoStyleAnimationListBorrowed,