Add 'withKeyword' to mixin application with Fasta.

pkg/front_end/lib/src/fasta/parser/parser.dart

 // Copyright (c) 2012, 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.parser.parser;
 
 import '../scanner.dart' show ErrorToken;
 
 import '../scanner/recover.dart' show closeBraceFor, skipToEof;
 
@@ skipping 404 matching lines @@
       token = parseTypeVariablesOpt(token);
       token = parseFormalParameters(token);
     }
     listener.endFunctionTypeAlias(typedefKeyword, equals, token);
     return expect(';', token);
   }
 
   Token parseMixinApplication(Token token) {
     listener.beginMixinApplication(token);
     token = parseType(token);
+    Token withKeyword = token;
     token = expect('with', token);
     token = parseTypeList(token);
-    listener.endMixinApplication();
+    listener.endMixinApplication(withKeyword);
     return token;
   }
 
   Token parseReturnTypeOpt(Token token) {
     if (identical(token.stringValue, 'void')) {
       if (isGeneralizedFunctionType(token.next)) {
         return parseType(token);
       } else {
         listener.handleVoidKeyword(token);
         return token.next;
@@ skipping 3134 matching lines @@
         break;
     }
     if (isRecoverable) {
       listener.handleRecoverableError(token, kind, arguments);
       return null;
     } else {
       return listener.handleUnrecoverableError(token, kind, arguments);
     }
   }
 }