Remove triple-shift from dart2js.

pkg/compiler/lib/src/resolution/members.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.resolution.members;
 
 import '../common.dart';
 import '../common/names.dart' show
     Selectors;
 import '../common/resolution.dart' show
@@ skipping 647 matching lines @@
     if (node.isIndex) {
       return isSet ? new Selector.indexSet() : new Selector.index();
     }
 
     if (node.isOperator) {
       String source = node.selector.asOperator().source;
       String string = source;
       if (identical(string, '!') ||
           identical(string, '&&') || identical(string, '||') ||
           identical(string, 'is') || identical(string, 'as') ||
-          identical(string, '?') || identical(string, '??') ||
-          identical(string, '>>>')) {
+          identical(string, '?') || identical(string, '??')) {
         return null;
       }
       String op = source;
       if (!isUserDefinableOperator(source)) {
         op = Elements.mapToUserOperatorOrNull(source);
       }
       if (op == null) {
         // Unsupported operator. An error has been reported during parsing.
         return new Selector.call(
             new Name(source, library),
@@ skipping 4184 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(DiagnosticReporter reporter, Node node,
                       Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), reporter, node);
 }