Start marking functions that can transitively trigger a GC (#33144)

* Mark JS reflector wrappers as CanGc.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Propagate CanGc from reflect_dom_object_with_proto.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Mark DOM constructors as GC operations.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

1 files changed, 11 insertions, 3 deletions

diff --git a/components/script/dom/mediametadata.rs b/components/script/dom/mediametadata.rs
index f23aac0d4e6..ef647d20982 100644
--- a/components/script/dom/mediametadata.rs
+++ b/components/script/dom/mediametadata.rs
@@ -15,6 +15,7 @@ use crate::dom::bindings::root::{DomRoot, MutNullableDom};
 use crate::dom::bindings::str::DOMString;
 use crate::dom::mediasession::MediaSession;
 use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
 
 #[dom_struct]
 pub struct MediaMetadata {
@@ -37,15 +38,21 @@ impl MediaMetadata {
     }
 
     pub fn new(global: &Window, init: &MediaMetadataInit) -> DomRoot<MediaMetadata> {
-        Self::new_with_proto(global, None, init)
+        Self::new_with_proto(global, None, init, CanGc::note())
     }
 
     fn new_with_proto(
         global: &Window,
         proto: Option<HandleObject>,
         init: &MediaMetadataInit,
+        can_gc: CanGc,
     ) -> DomRoot<MediaMetadata> {
-        reflect_dom_object_with_proto(Box::new(MediaMetadata::new_inherited(init)), global, proto)
+        reflect_dom_object_with_proto(
+            Box::new(MediaMetadata::new_inherited(init)),
+            global,
+            proto,
+            can_gc,
+        )
     }
 
     /// <https://w3c.github.io/mediasession/#dom-mediametadata-mediametadata>
@@ -53,9 +60,10 @@ impl MediaMetadata {
     pub fn Constructor(
         window: &Window,
         proto: Option<HandleObject>,
+        can_gc: CanGc,
         init: &MediaMetadataInit,
     ) -> Fallible<DomRoot<MediaMetadata>> {
-        Ok(MediaMetadata::new_with_proto(window, proto, init))
+        Ok(MediaMetadata::new_with_proto(window, proto, init, can_gc))
     }
 
     fn queue_update_metadata_algorithm(&self) {