Pop named mixin type variables in correct order.

pkg/front_end/lib/src/fasta/source/outline_builder.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.
 
 library fasta.outline_builder;
 
 import 'package:kernel/ast.dart' show
     AsyncMarker,
     ProcedureKind;
 
@@ skipping 249 matching lines @@
   void beginNamedMixinApplication(Token token) {
     library.beginNestedScope();
   }
 
   @override
   void endNamedMixinApplication(
       Token classKeyword, Token implementsKeyword, Token endToken) {
     debugEvent("endNamedMixinApplication");
     List<TypeBuilder> interfaces = popIfNotNull(implementsKeyword);
     TypeBuilder mixinApplication = pop();
-    int modifiers = Modifier.validate(pop());
     List<TypeVariableBuilder> typeVariables = pop();
     String name = pop();
+    int modifiers = Modifier.validate(pop());
     List<MetadataBuilder> metadata = pop();
     library.addNamedMixinApplication(
         metadata, name, typeVariables, modifiers, mixinApplication, interfaces);
     checkEmpty();
   }
 
   @override
   void endTypeArguments(int count, Token beginToken, Token endToken) {
     debugEvent("TypeArguments");
     push(popList(count) ?? NullValue.TypeArguments);
@@ skipping 239 matching lines @@
   void handleModifiers(int count) {
     debugEvent("Modifiers");
     push(popList(count) ?? NullValue.Modifiers);
   }
 
   @override
   void debugEvent(String name) {
     // printEvent(name);
   }
 }