Auto merge of #25217 - pshaughn:fix25150, r=jdm

hidden field named _charset_ now appears in FormData as UTF-8

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HTMLInputElement now has special case logic for putting a hidden field named `_charset_` in an entry set. To support this, the encoding used when constructing a form dataset is now being passed further down the callchain than it was before.

---
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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 #25150

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- [X] There are tests for these changes

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1 files changed, 1 insertions, 1 deletions

diff --git a/components/script/dom/formdata.rs b/components/script/dom/formdata.rs
index 7a084ca0162..d0572e9b0e1 100644
--- a/components/script/dom/formdata.rs
+++ b/components/script/dom/formdata.rs
@@ -55,7 +55,7 @@ impl FormData {
         form: Option<&HTMLFormElement>,
     ) -> Fallible<DomRoot<FormData>> {
         if let Some(opt_form) = form {
-            return match opt_form.get_form_dataset(None) {
+            return match opt_form.get_form_dataset(None, None) {
                 Some(form_datums) => Ok(FormData::new(Some(form_datums), global)),
                 None => Err(Error::InvalidState),
             };