Remove triple-shift from dart2js.

pkg/compiler/lib/src/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 dart2js.parser;
 
 import '../common.dart';
 import '../tokens/keyword.dart' show
     Keyword;
 import '../tokens/precedence.dart' show
@@ skipping 762 matching lines @@
       int count = 0;
       do {
         token = stuffParser(token.next);
         ++count;
       } while (optional(',', token));
       Token next = token.next;
       if (identical(token.stringValue, '>>')) {
         token = new SymbolToken(GT_INFO, token.charOffset);
         token.next = new SymbolToken(GT_INFO, token.charOffset + 1);
         token.next.next = next;
-      } else if (identical(token.stringValue, '>>>')) {
-        token = new SymbolToken(GT_INFO, token.charOffset);
-        token.next = new SymbolToken(GT_GT_INFO, token.charOffset + 1);
-        token.next.next = next;
       }
       endStuff(count, begin, token);
       return expect('>', token);
     }
     handleNoStuff(token);
     return token;
   }
 
   Token parseTopLevelMember(Token token) {
     Token start = token;
@@ skipping 1985 matching lines @@
     }
     listener.handleContinueStatement(hasTarget, continueKeyword, token);
     return expectSemicolon(token);
   }
 
   Token parseEmptyStatement(Token token) {
     listener.handleEmptyStatement(token);
     return expectSemicolon(token);
   }
 }