No tracing of nop traceable fields (#29926)

* Add `no_trace` option to JSTraceable derive

* NoTrace wrapper

* Port some types to no_trace schematics

* Fixing my unsafe mistakes (not tracing traceables)

* Add docs & safety guards for no_trace

Safety guards (trait shenanigans) guarantees safety usage of `no_trace`

* Port canvas_traits to no_trace

* Port servo_media to no_trace

* Port net_traits to no_trace

* Port style to no_trace

* Port webgpu to no_trace

* Port script_traits to no_trace

* Port canvas_traits, devtools_traits, embedder_traits, profile_traits to no_trace

* unrooted_must_root lint in seperate file

* Add trace_in_no_trace_lint as script_plugin

* Composable types in must_not_have_traceable

* Introduced HashMapTracedValues wrapper

* `HashMap<NoTrace<K>,V>`->`HashMapTracedValues<K,V>`

* Port rest of servo's types to no_trace

* Port html5ever, euclid, mime and http to no_trace

* Port remaining externals to no_trace

* Port webxr and Arc<Mutex<_>>

* Fix spelling in notrace doc

1 files changed, 5 insertions, 4 deletions

diff --git a/components/script/dom/documentfragment.rs b/components/script/dom/documentfragment.rs
index 8f35a0d8781..f2455f61130 100644
--- a/components/script/dom/documentfragment.rs
+++ b/components/script/dom/documentfragment.rs
@@ -19,14 +19,15 @@ use crate::dom::window::Window;
 use dom_struct::dom_struct;
 use js::rust::HandleObject;
 use servo_atoms::Atom;
-use std::collections::HashMap;
+
+use super::bindings::trace::HashMapTracedValues;
 
 // https://dom.spec.whatwg.org/#documentfragment
 #[dom_struct]
 pub struct DocumentFragment {
     node: Node,
     /// Caches for the getElement methods
-    id_map: DomRefCell<HashMap<Atom, Vec<Dom<Element>>>>,
+    id_map: DomRefCell<HashMapTracedValues<Atom, Vec<Dom<Element>>>>,
 }
 
 impl DocumentFragment {
@@ -34,7 +35,7 @@ impl DocumentFragment {
     pub fn new_inherited(document: &Document) -> DocumentFragment {
         DocumentFragment {
             node: Node::new_inherited(document),
-            id_map: DomRefCell::new(HashMap::new()),
+            id_map: DomRefCell::new(HashMapTracedValues::new()),
         }
     }
 
@@ -63,7 +64,7 @@ impl DocumentFragment {
         Ok(DocumentFragment::new_with_proto(&document, proto))
     }
 
-    pub fn id_map(&self) -> &DomRefCell<HashMap<Atom, Vec<Dom<Element>>>> {
+    pub fn id_map(&self) -> &DomRefCell<HashMapTracedValues<Atom, Vec<Dom<Element>>>> {
         &self.id_map
     }
 }