Pass a MutableHandle to fill_property_descriptor.

components/script/dom/bindings/codegen/CodegenRust.py

@@ -4775,7 +4775,7 @@ class CGDOMJSProxyHandler_getOwnPropertyDescriptor(CGAbstractExternMethod):
     def __init__(self, descriptor):
         args = [Argument('*mut JSContext', 'cx'), Argument('HandleObject', 'proxy'),
                 Argument('HandleId', 'id'),
-                Argument('MutableHandle<PropertyDescriptor>', 'desc', mutable=True)]
+                Argument('MutableHandle<PropertyDescriptor>', 'desc')]
         CGAbstractExternMethod.__init__(self, descriptor, "getOwnPropertyDescriptor",
                                         "bool", args)
         self.descriptor = descriptor
@@ -4794,7 +4794,7 @@ def getBody(self):
                 attrs += " | JSPROP_READONLY"
             # FIXME(#11868) Should assign to desc.value, desc.get() is a copy.
             fillDescriptor = ("desc.get().value = result_root.get();\n"
-                              "fill_property_descriptor(&mut desc, proxy.get(), %s);\n"
+                              "fill_property_descriptor(desc, proxy.get(), %s);\n"
                               "return true;" % attrs)
             templateValues = {
                 'jsvalRef': 'result_root.handle_mut()',
@@ -4820,7 +4820,7 @@ def getBody(self):
                 attrs = "0"
             # FIXME(#11868) Should assign to desc.value, desc.get() is a copy.
             fillDescriptor = ("desc.get().value = result_root.get();\n"
-                              "fill_property_descriptor(&mut desc, proxy.get(), %s);\n"
+                              "fill_property_descriptor(desc, proxy.get(), %s);\n"
                               "return true;" % attrs)
             templateValues = {
                 'jsvalRef': 'result_root.handle_mut()',

components/script/dom/bindings/proxyhandler.rs

@@ -186,7 +186,7 @@ pub fn ensure_expando_object(cx: *mut JSContext, obj: HandleObject) -> *mut JSOb
 
 /// Set the property descriptor's object to `obj` and set it to enumerable,
 /// and writable if `readonly` is true.
-pub fn fill_property_descriptor(desc: &mut PropertyDescriptor,
+pub fn fill_property_descriptor(mut desc: MutableHandle<PropertyDescriptor>,
                                 obj: *mut JSObject,
                                 attrs: u32) {
     desc.obj = obj;

components/script/dom/browsingcontext.rs

@@ -256,7 +256,7 @@ unsafe extern "C" fn getOwnPropertyDescriptor(cx: *mut JSContext,
         rooted!(in(cx) let mut val = UndefinedValue());
         window.to_jsval(cx, val.handle_mut());
         desc.value = val.get();
-        fill_property_descriptor(&mut desc, proxy.get(), JSPROP_READONLY);
+        fill_property_descriptor(desc, proxy.get(), JSPROP_READONLY);
         return true;
     }