2 files changed, 8 insertions, 1 deletions
diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 00df29230c3..16663692ed7 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -1748,12 +1748,14 @@ def DOMClass(descriptor):
         # padding.
         protoList.extend(['PrototypeList::ID::Count'] * (descriptor.config.maxProtoChainLength - len(protoList)))
         prototypeChainString = ', '.join(protoList)
+        heapSizeOf = 'heap_size_of_raw_self_and_children::<%s>' % descriptor.interface.identifier.name
         return """\
 DOMClass {
     interface_chain: [ %s ],
     native_hooks: &sNativePropertyHooks,
     type_id: %s,
-}""" % (prototypeChainString, DOMClassTypeId(descriptor))
+    heap_size_of: %s as unsafe fn(_) -> _,
+}""" % (prototypeChainString, DOMClassTypeId(descriptor), heapSizeOf)
 
 
 class CGDOMJSClass(CGThing):
@@ -5139,6 +5141,7 @@ class CGBindingRoot(CGThing):
             'dom::bindings::num::Finite',
             'dom::bindings::str::ByteString',
             'dom::bindings::str::USVString',
+            'mem::heap_size_of_raw_self_and_children',
             'libc',
             'util::str::DOMString',
             'std::borrow::ToOwned',
diff --git a/components/script/dom/bindings/utils.rs b/components/script/dom/bindings/utils.rs
index 52cf58e4ff0..3b672e68f9e 100644
--- a/components/script/dom/bindings/utils.rs
+++ b/components/script/dom/bindings/utils.rs
@@ -150,6 +150,7 @@ pub struct NativePropertyHooks {
 }
 
 /// The struct that holds inheritance information for DOM object reflectors.
+#[allow(raw_pointer_derive)]
 #[derive(Copy, Clone)]
 pub struct DOMClass {
     /// A list of interfaces that this object implements, in order of decreasing
@@ -161,6 +162,9 @@ pub struct DOMClass {
 
     /// The NativePropertyHooks for the interface associated with this class.
     pub native_hooks: &'static NativePropertyHooks,
+
+    /// The HeapSizeOf function wrapper for that interface.
+    pub heap_size_of: unsafe fn(*const libc::c_void) -> usize,
 }
 unsafe impl Sync for DOMClass {}