Auto merge of #14096 - fflorent:11485-make-dom-methods-taking-mut-JSContent-unsafe, r=nox

11485 make dom methods taking mut js content unsafe

This is a rebased version of PR #11595

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #11485

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because: no code logic was changed

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components/script/dom/document.rs

@@ -2803,7 +2803,7 @@ impl DocumentMethods for Document {
 
     #[allow(unsafe_code)]
     // https://html.spec.whatwg.org/multipage/#dom-tree-accessors:dom-document-nameditem-filter
-    fn NamedGetter(&self, _cx: *mut JSContext, name: DOMString) -> Option<NonZero<*mut JSObject>> {
+    unsafe fn NamedGetter(&self, _cx: *mut JSContext, name: DOMString) -> Option<NonZero<*mut JSObject>> {
         #[derive(JSTraceable, HeapSizeOf)]
         struct NamedElementFilter {
             name: Atom,
@@ -2871,9 +2871,7 @@ impl DocumentMethods for Document {
                 if elements.peek().is_none() {
                     // TODO: Step 2.
                     // Step 3.
-                    return unsafe {
-                        Some(NonZero::new(first.reflector().get_jsobject().get()))
-                    };
+                    return Some(NonZero::new(first.reflector().get_jsobject().get()));
                 }
             } else {
                 return None;
@@ -2884,9 +2882,7 @@ impl DocumentMethods for Document {
             name: name,
         };
         let collection = HTMLCollection::create(self.window(), root, box filter);
-        unsafe {
-            Some(NonZero::new(collection.reflector().get_jsobject().get()))
-        }
+        Some(NonZero::new(collection.reflector().get_jsobject().get()))
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-tree-accessors:supported-property-names