Parse for-in statements with Fasta.

pkg/front_end/lib/src/fasta/kernel/body_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.body_builder;
 
 import '../parser/parser.dart' show FormalParameterType, optional;
 
 import '../parser/error_kind.dart' show ErrorKind;
 
@@ skipping 1880 matching lines @@
 
   @override
   void endForInExpression(Token token) {
     debugEvent("ForInExpression");
     Expression expression = popForValue();
     exitLocalScope();
     push(expression ?? NullValue.Expression);
   }
 
   @override
-  void endForIn(
-      Token awaitToken, Token forToken, Token inKeyword, Token endToken) {
+  void endForIn(Token awaitToken, Token forToken, Token leftParenthesis,
+      Token inKeyword, Token rightParenthesis, Token endToken) {
     debugEvent("ForIn");
     Statement body = popStatement();
     Expression expression = popForValue();
     var lvalue = pop();
     exitLocalScope();
     JumpTarget continueTarget = exitContinueTarget();
     JumpTarget breakTarget = exitBreakTarget();
     if (continueTarget.hasUsers) {
       body = new LabeledStatement(body);
       continueTarget.resolveContinues(body);
@@ skipping 856 matching lines @@
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisAccessor) {
     return node.isSuper ? "super" : "this";
   } else if (node is BuilderAccessor) {
     return node.plainNameForRead;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }