fixes browser/runtime_test, and a few extension member fixes

test/browser/runtime_tests.js

 // Copyright (c) 2015, 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.
 
 var assert = chai.assert;
 
 suite('generic', () => {
   "use strict";
 
   let generic = dart.generic;
@@ skipping 57 matching lines @@
 
   test('type constructor is reflectable', () => {
     let SomeType = generic(function(x, y) { return Object.create(null); });
     let someValue = SomeType('hi', 123);
     assert.equal(someValue[dart.originalDeclaration], SomeType);
     assert.deepEqual(someValue[dart.typeArguments], ['hi', 123]);
   });
 
   test('proper type constructor is called', () => {
     // This tests https://github.com/dart-lang/dev_compiler/issues/178
-    let l = dart.setType([1, 2, 3], core.List$(core.int));
-    let s = l[core.$join]();
+    let l = dart.list([1, 2, 3], core.int);
+    let s = l[dartx.join]();
     assert.equal(s, '123');
   });
 });
 
 
 suite('instanceOf', () => {
   "use strict";
 
   let expect = assert.equal;
   let isGroundType = dart.isGroundType;
@@ skipping 503 matching lines @@
     checkType(dart.bind(mapB, 'forEach'),
         dart.functionType(dart.void, [
             dart.functionType(dart.void, [core.int, core.int])]));
     checkType(dart.bind(mapB, 'forEach'),
         dart.functionType(dart.void, [
             dart.functionType(dart.void, [core.int, core.String])]),
               false);
 
     // Tear off of a method with a symbol name
     let listB = new (c.ListBase$(core.int))();
-    checkType(dart.bind(listB, core.$add),
+    checkType(dart.bind(listB, dartx.add),
               dart.functionType(dart.void, [core.int]));
-    checkType(dart.bind(listB, core.$add),
+    checkType(dart.bind(listB, dartx.add),
               dart.functionType(dart.void, [core.String]), false);
 
     // Tear off of a static method
     checkType(c.ListBase.listToString,
               dart.functionType(core.String, [core.List]));
     checkType(c.ListBase.listToString,
               dart.functionType(core.String, [core.String]), false);
 
     // Tear off a mixin method
     class Base {
@@ skipping 86 matching lines @@
 
 suite('primitives', function() {
   'use strict';
 
   test('fixed length list', () => {
     let list = new core.List(10);
     list[0] = 42;
     assert.throws(() => list.add(42));
   });
 });