LibWeb: Make factory method of DOM::Text fallible

Author: https://github.com/kennethmyhra
Commit: 200d22c650
Pull-request: https://github.com/SerenityOS/serenity/pull/17491
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/DOM/Text.cpp

@@ -39,11 +39,11 @@ void Text::visit_edges(Cell::Visitor& visitor)
 }
 
 // https://dom.spec.whatwg.org/#dom-text-text
-JS::NonnullGCPtr<Text> Text::construct_impl(JS::Realm& realm, DeprecatedString const& data)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<Text>> Text::construct_impl(JS::Realm& realm, DeprecatedString const& data)
 {
     // The new Text(data) constructor steps are to set this’s data to data and this’s node document to current global object’s associated Document.
     auto& window = verify_cast<HTML::Window>(HTML::current_global_object());
-    return realm.heap().allocate<Text>(realm, window.associated_document(), data).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<Text>(realm, window.associated_document(), data));
 }
 
 void Text::set_owner_input_element(Badge<HTML::HTMLInputElement>, HTML::HTMLInputElement& input_element)