diff --git a/content/html/content/src/HTMLSharedObjectElement.h b/content/html/content/src/HTMLSharedObjectElement.h
index 3e88a9bd1f48..82724ec0c7bc 100644
--- a/content/html/content/src/HTMLSharedObjectElement.h
+++ b/content/html/content/src/HTMLSharedObjectElement.h
@@ -104,6 +104,114 @@ public:
{
return static_cast(this);
}
+
+ // WebIDL API for