script: Initialize IDBCursor and IDBCursorWithValue interfaces (#38850)

Testing: Update WPT test expectation
Fixes: Part of #38111

---------

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>

components/script/dom/idbcursorwithvalue.rs

@@ -0,0 +1,78 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use dom_struct::dom_struct;
+use js::rust::MutableHandleValue;
+use net_traits::indexeddb_thread::IndexedDBKeyRange;
+
+use crate::dom::bindings::codegen::Bindings::IDBCursorBinding::IDBCursorDirection;
+use crate::dom::bindings::codegen::Bindings::IDBCursorWithValueBinding::IDBCursorWithValueMethods;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::idbcursor::{IDBCursor, ObjectStoreOrIndex};
+use crate::dom::idbtransaction::IDBTransaction;
+use crate::script_runtime::{CanGc, JSContext as SafeJSContext};
+
+#[dom_struct]
+pub(crate) struct IDBCursorWithValue {
+    cursor: IDBCursor,
+}
+
+impl IDBCursorWithValue {
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    fn new_inherited(
+        transaction: &IDBTransaction,
+        direction: IDBCursorDirection,
+        got_value: bool,
+        source: ObjectStoreOrIndex,
+        range: IndexedDBKeyRange,
+        key_only: bool,
+    ) -> IDBCursorWithValue {
+        IDBCursorWithValue {
+            cursor: IDBCursor::new_inherited(
+                transaction,
+                direction,
+                got_value,
+                source,
+                range,
+                key_only,
+            ),
+        }
+    }
+
+    #[expect(unused)]
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    #[allow(clippy::too_many_arguments)]
+    pub(crate) fn new(
+        global: &GlobalScope,
+        transaction: &IDBTransaction,
+        direction: IDBCursorDirection,
+        got_value: bool,
+        source: ObjectStoreOrIndex,
+        range: IndexedDBKeyRange,
+        key_only: bool,
+        can_gc: CanGc,
+    ) -> DomRoot<IDBCursorWithValue> {
+        reflect_dom_object(
+            Box::new(IDBCursorWithValue::new_inherited(
+                transaction,
+                direction,
+                got_value,
+                source,
+                range,
+                key_only,
+            )),
+            global,
+            can_gc,
+        )
+    }
+}
+
+impl IDBCursorWithValueMethods<crate::DomTypeHolder> for IDBCursorWithValue {
+    /// <https://www.w3.org/TR/IndexedDB-2/#dom-idbcursorwithvalue-value>
+    fn Value(&self, _cx: SafeJSContext, value: MutableHandleValue) {
+        self.cursor.value(value);
+    }
+}