Upgrade Stylo to 2025-02-03 (#35289)

* Upgrade Stylo to 2025-02-03

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

* Fixup for https://phabricator.services.mozilla.com/D233218

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

* Fixup for https://phabricator.services.mozilla.com/D233758

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

* Fixup for https://phabricator.services.mozilla.com/D231255

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

* Update test expectations

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

---------

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

1 files changed, 12 insertions, 5 deletions

diff --git a/components/script/layout_dom/element.rs b/components/script/layout_dom/element.rs
index 1abd64e1fbf..05271793184 100644
--- a/components/script/layout_dom/element.rs
+++ b/components/script/layout_dom/element.rs
@@ -33,6 +33,7 @@ use style::selector_parser::{
     SelectorImpl,
 };
 use style::shared_lock::Locked as StyleLocked;
+use style::stylesheets::scope_rule::ImplicitScopeRoot;
 use style::values::computed::Display;
 use style::values::{AtomIdent, AtomString};
 use style::CaseSensitivityExt;
@@ -498,16 +499,22 @@ impl<'dom> style::dom::TElement for ServoLayoutElement<'dom> {
     {
     }
 
-    /// Convert an opaque element back into the element.
-    fn unopaque(opaque: ::selectors::OpaqueElement) -> Self {
-        unsafe {
-            let ptr = opaque.as_const_ptr::<JSObject>();
+    /// Returns the implicit scope root for given sheet index and host.
+    fn implicit_scope_for_sheet_in_shadow_root(
+        opaque_host: ::selectors::OpaqueElement,
+        sheet_index: usize,
+    ) -> Option<ImplicitScopeRoot> {
+        // As long as this "unopaqued" element does not escape this function, we're not leaking
+        // potentially-mutable elements from opaque elements.
+        let host = unsafe {
+            let ptr = opaque_host.as_const_ptr::<JSObject>();
             let untrusted_address = UntrustedNodeAddress::from_id(ptr as usize);
             let node = Node::from_untrusted_node_address(untrusted_address);
             let trusted_address = node.to_trusted_node_address();
             let servo_layout_node = ServoLayoutNode::new(&trusted_address);
             servo_layout_node.as_element().unwrap()
-        }
+        };
+        host.shadow_root()?.implicit_scope_for_sheet(sheet_index)
     }
 
     fn slotted_nodes(&self) -> &[Self::ConcreteNode] {