Revert "Revert "Allow multiple tags in native clause.""

tests/compiler/dart2js_native/native_mixin_field_test.dart

Index: tests/compiler/dart2js_native/native_mixin_field_test.dart
diff --git a/tests/compiler/dart2js_native/native_mixin_field_test.dart b/tests/compiler/dart2js_native/native_mixin_field_test.dart
index d17ff62725222c3b44d843583ddc5779b2968f6a..322381ff42bfd142179bcea16d13bd7a815c662d 100644
--- a/tests/compiler/dart2js_native/native_mixin_field_test.dart
+++ b/tests/compiler/dart2js_native/native_mixin_field_test.dart
@@ -7,11 +7,11 @@ import "package:expect/expect.dart";
 // Test that native classes can use ordinary Dart classes with fields
 // as mixins.
 
-class A native "*A" {
+class A native "A" {
   var foo;
 }
 
-class B extends A with M1, M2 native "*B" {
+class B extends A with M1, M2 native "B" {
   var bar;
 }