Revert "wrap_jso should wrap JsArray as well, not always call wrap on its contents"

tools/dom/templates/html/dartium/html_dartium.darttemplate

Index: tools/dom/templates/html/dartium/html_dartium.darttemplate
diff --git a/tools/dom/templates/html/dartium/html_dartium.darttemplate b/tools/dom/templates/html/dartium/html_dartium.darttemplate
index e33b195264cdafaffb5da53c235395c0ec38ad21..cb5e7dd2037f7cc3338f5fb6a261635e2a1e43df 100644
--- a/tools/dom/templates/html/dartium/html_dartium.darttemplate
+++ b/tools/dom/templates/html/dartium/html_dartium.darttemplate
@@ -404,12 +404,6 @@ wrap_jso(jsObject) {
       return wrapper;
     }
 
-    if (jsObject is js.JsArray) {
-      var wrappingList = new _DartHtmlWrappingList(jsObject);
-      js.setDartHtmlWrapperFor(jsObject, wrappingList);
-      return wrappingList;
-    }
-
     // Try the most general type conversions on it.
     // TODO(alanknight): We may be able to do better. This maintains identity,
     // which is useful, but expensive. And if we nest something that only
@@ -555,22 +549,6 @@ convertDartToNative_List(List input) => new js.JsArray()..addAll(input);
 // Conversion function place holder (currently not used in dart2js or dartium).
 List convertDartToNative_StringArray(List<String> input) => input;
 
-/**
- * Wraps a JsArray and will call wrap_jso on its entries.
- */
-class _DartHtmlWrappingList extends ListBase {
-  _DartHtmlWrappingList(this._basicList);
-
-  final js.JsArray _basicList;
-
-  operator [](int index) => wrap_jso(_basicList[index]);
-
-  operator []=(int index, value) => _basicList[index] = unwrap_jso(value);
-
-  int get length => _basicList.length;
-  int set length(int newLength) => _basicList.length = newLength;
-}
-
 $else
 class JsoNativeFieldWrapper extends NativeFieldWrapperClass2 {}