Fixed analyzer test to use dart2js not dartium

sdk/lib/js_util/dartium/js_util_dartium.dart

-// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// Utility methods to efficiently manipulate typed JSInterop objects in cases
-/// where the name to call is not known at runtime. You should only use these
-/// methods when the same effect cannot be achieved with @JS annotations.
-/// These methods would be extension methods on JSObject if Dart supported
-/// extension methods.
-library dart.js_util;
-
-import 'dart:js';
-
-/// WARNING: performance of this method is much worse than other util
-/// methods in this library. Only use this method as a last resort.
-///
-/// Recursively converts a JSON-like collection of Dart objects to a
-/// collection of JavaScript objects and returns a [JsObject] proxy to it.
-///
-/// [object] must be a [Map] or [Iterable], the contents of which are also
-/// converted. Maps and Iterables are copied to a new JavaScript object.
-/// Primitives and other transferable values are directly converted to their
-/// JavaScript type, and all other objects are proxied.
-jsify(object) {
-  if ((object is! Map) && (object is! Iterable)) {
-    throw new ArgumentError("object must be a Map or Iterable");
-  }
-  return JsNative.jsify(object);
-}
-
-JSObject newObject() => JsNative.newObject();
-
-hasProperty(JSObject o, name) => JsNative.hasProperty(o, name);
-getProperty(JSObject o, name) => JsNative.getProperty(o, name);
-setProperty(JSObject o, name, value) => JsNative.setProperty(o, name, value);
-callMethod(JSObject o, String method, List args) =>
-    JsNative.callMethod(o, method, args);
-instanceof(JSObject o, Function type) => JsNative.instanceof(o, type);
-callConstructor(JSObject constructor, List args) =>
-    JsNative.callConstructor(constructor, args);