script: Fix code generation for named getters.

Fixes part of #18535

components/script/dom/bindings/codegen/CodegenRust.py

@@ -4938,8 +4938,6 @@ class CGDOMJSProxyHandler_defineProperty(CGAbstractExternMethod):
             set += ("if RUST_JSID_IS_STRING(id) {\n" +
                     CGIndenter(CGProxyNamedSetter(self.descriptor)).define() +
                     "    return (*opresult).succeed();\n" +
-                    "} else {\n" +
-                    "    return false;\n" +
                     "}\n")
         else:
             set += ("if RUST_JSID_IS_STRING(id) {\n" +

tests/wpt/metadata/webstorage/storage_setitem.html.ini

@@ -1,6 +1,5 @@
 [storage_setitem.html]
   type: testharness
-  expected: TIMEOUT
   [localStorage[\] = "<22>"]
     expected: FAIL
     bug: https://github.com/servo/servo/issues/6564
@@ -14,6 +13,72 @@
     bug: https://github.com/servo/servo/issues/6564
 
   [localStorage["0"\]]
-    expected: TIMEOUT
+    expected: FAIL
     bug: https://github.com/servo/servo/issues/10686
 
+  [localStorage["1"\]]
+    expected: FAIL
+
+  [localStorage["2"\]]
+    expected: FAIL
+
+  [localStorage["3"\]]
+    expected: FAIL
+
+  [localStorage["4"\]]
+    expected: FAIL
+
+  [localStorage["5"\]]
+    expected: FAIL
+
+  [localStorage["6"\]]
+    expected: FAIL
+
+  [localStorage["7"\]]
+    expected: FAIL
+
+  [localStorage["8"\]]
+    expected: FAIL
+
+  [localStorage["9"\]]
+    expected: FAIL
+
+  [sessionStorage[\] = "<22>"]
+    expected: FAIL
+
+  [sessionStorage[\] = "<22>a"]
+    expected: FAIL
+
+  [sessionStorage[\] = "a<>"]
+    expected: FAIL
+
+  [sessionStorage["0"\]]
+    expected: FAIL
+
+  [sessionStorage["1"\]]
+    expected: FAIL
+
+  [sessionStorage["2"\]]
+    expected: FAIL
+
+  [sessionStorage["3"\]]
+    expected: FAIL
+
+  [sessionStorage["4"\]]
+    expected: FAIL
+
+  [sessionStorage["5"\]]
+    expected: FAIL
+
+  [sessionStorage["6"\]]
+    expected: FAIL
+
+  [sessionStorage["7"\]]
+    expected: FAIL
+
+  [sessionStorage["8"\]]
+    expected: FAIL
+
+  [sessionStorage["9"\]]
+    expected: FAIL
+

tests/wpt/mozilla/meta/css/css-position-3/position-sticky-nested-bottom.html.ini

@@ -5,4 +5,3 @@
   [Untitled]
     expected: FAIL
 
-