Pass '=' to endNamedMixinApplication().

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
@@ skipping 713 matching lines @@
 
     if (isMixinApplication) {
       listener.beginNamedMixinApplication(begin, name);
     } else {
       listener.beginClassDeclaration(begin, name);
     }
 
     token = parseTypeVariablesOpt(token);
 
     if (optional('=', token)) {
-      token = expect('=', token);
-      return parseNamedMixinApplication(token, begin, name);
+      Token equals = token;
+      token = token.next;
+      return parseNamedMixinApplication(token, begin, name, equals);
     } else {
       return parseClass(token, begin, name);
     }
   }
 
-  Token parseNamedMixinApplication(Token token, Token begin, Token name) {
+  Token parseNamedMixinApplication(Token token, Token begin, Token name,
+      Token equals) {
     token = parseMixinApplication(token);
     Token implementsKeyword = null;
     if (optional('implements', token)) {
       implementsKeyword = token;
       token = parseTypeList(token.next);
     }
-    listener.endNamedMixinApplication(begin, implementsKeyword, token);
+    listener.endNamedMixinApplication(begin, equals, implementsKeyword, token);
     return expect(';', token);
   }
 
   Token parseClass(Token token, Token begin, Token name) {
     Token extendsKeyword;
     if (optional('extends', token)) {
       extendsKeyword = token;
       if (optional('with', peekAfterType(token.next))) {
         token = parseMixinApplication(token.next);
       } else {
@@ skipping 2556 matching lines @@
         break;
     }
     if (isRecoverable) {
       listener.handleRecoverableError(token, kind, arguments);
       return null;
     } else {
       return listener.handleUnrecoverableError(token, kind, arguments);
     }
   }
 }