Handle platform access through prefix in dart2dart

tests/language/regress_21998_1_test.dart

Index: tests/language/regress_21998_1_test.dart
diff --git a/tests/compiler/dart2js_native/only_pass_on_jsshell_test.dart b/tests/language/regress_21998_1_test.dart
similarity index 50%
copy from tests/compiler/dart2js_native/only_pass_on_jsshell_test.dart
copy to tests/language/regress_21998_1_test.dart
index 17fce76f02882c3c64161398f14eb702299393ef..3237f3396629f6fd11270e1adc290bec78713958 100644
--- a/tests/compiler/dart2js_native/only_pass_on_jsshell_test.dart
+++ b/tests/language/regress_21998_1_test.dart
@@ -1,12 +1,18 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
+import 'dart:math' as Math;
 import 'package:expect/expect.dart';
 
-import 'dart:_js_helper' show Primitives;
-
 main() {
-  Expect.isFalse(Primitives.isD8);
-  Expect.isTrue(Primitives.isJsshell);
+  Expect.equals(4, new C().m());
 }
+
+class C {
+  max(a) => a;
+
+  m() {
+    return max(Math.max(2, 4));
+  }
+}