Fixes in dart2js parser to be able to parse files without the diet-parser

pkg/compiler/lib/src/parser/partial_parser.dart

 // Copyright (c) 2011, 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 dart2js.parser.partial;
 
 import '../common.dart';
 import '../options.dart' show ParserOptions;
 import '../tokens/token.dart' show BeginGroupToken, ErrorToken, Token;
 import '../tokens/token_constants.dart' as Tokens show EOF_TOKEN;
 import '../util/characters.dart' as Characters show $CLOSE_CURLY_BRACKET;
 import 'listener.dart' show Listener;
 import 'parser.dart' show Parser;
 
 class PartialParser extends Parser {
   PartialParser(Listener listener, ParserOptions options)
       : super(listener, options);
 
   Token parseClassBody(Token token) => skipClassBody(token);
 
   Token fullParseClassBody(Token token) => super.parseClassBody(token);
 
   Token parseExpression(Token token) => skipExpression(token);
 
   Token parseArgumentsOpt(Token token) {
     // This method is overridden for two reasons:
     // 1. Avoid generating events for arguments.
     // 2. Avoid calling skip expression for each argument (which doesn't work).
+    listener.handleNoArguments(token);

[Siggi Cherem (dart-lang), 2016/09/30 22:28:07]

note: listeners now assume that metadata is always parsed, without this we had
an inconsistent state where the arguments of an annotation where missing.

question: in reason #1 above: was "generating events" meant calling listeners
like I do here? Should we remove that reason now?

     if (optional('(', token)) {
       BeginGroupToken begin = token;
       return begin.endGroup.next;
     } else {
       return token;
     }
   }
 
   Token skipExpression(Token token) {
     while (true) {
@@ skipping 128 matching lines @@
         return token;
       }
       return listener.unexpected(token);
     }
     BeginGroupToken beginGroupToken = token;
     Token endToken = beginGroupToken.endGroup;
     listener.endFormalParameters(0, token, endToken);
     return endToken.next;
   }
 }