Split parser/listener.dart, parser/class_element_listener.dart and tokens/token.dart into smaller l…

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 '../diagnostics/messages.dart' show
     MessageKind;
-import '../util/characters.dart' show
+import '../util/characters.dart' as Characters show
     $CLOSE_CURLY_BRACKET;
 import '../tokens/token.dart' show
     BeginGroupToken,
-    EOF_TOKEN,
     ErrorToken,
     Token;
+import '../tokens/token_constants.dart' as Tokens show
+    EOF_TOKEN;
 
 import 'listener.dart' show
     Listener;
 import 'parser.dart' show
     Parser;
 
 class PartialParser extends Parser {
   PartialParser(Listener listener) : super(listener);
 
   Token parseClassBody(Token token) => skipClassBody(token);
@@ skipping 11 matching lines @@
       return begin.endGroup.next;
     } else {
       return token;
     }
   }
 
   Token skipExpression(Token token) {
     while (true) {
       final kind = token.kind;
       final value = token.stringValue;
-      if ((identical(kind, EOF_TOKEN)) ||
+      if ((identical(kind, Tokens.EOF_TOKEN)) ||
           (identical(value, ';')) ||
           (identical(value, ',')) ||
           (identical(value, '}')) ||
           (identical(value, ')')) ||
           (identical(value, ']'))) {
         break;
       }
       if (identical(value, '=') ||
           identical(value, '?') ||
           identical(value, ':')) {
@@ skipping 47 matching lines @@
   }
 
   Token skipClassBody(Token token) {
     if (!optional('{', token)) {
       return listener.expectedClassBodyToSkip(token);
     }
     BeginGroupToken beginGroupToken = token;
     Token endGroup = beginGroupToken.endGroup;
     if (endGroup == null) {
       return listener.unmatched(beginGroupToken);
-    } else if (!identical(endGroup.kind, $CLOSE_CURLY_BRACKET)) {
+    } else if (!identical(endGroup.kind, Characters.$CLOSE_CURLY_BRACKET)) {
       return listener.unmatched(beginGroupToken);
     }
     return endGroup;
   }
 
   Token skipAsyncModifier(Token token) {
     String value = token.stringValue;
     if (identical(value, 'async')) {
       token = token.next;
       value = token.stringValue;
@@ skipping 46 matching lines @@
         return token;
       }
       return listener.unexpected(token);
     }
     BeginGroupToken beginGroupToken = token;
     Token endToken = beginGroupToken.endGroup;
     listener.endFormalParameters(0, token, endToken);
     return endToken.next;
   }
 }