Support for new 'deferred' import declaration modifier.

pkg/analyzer/lib/src/services/formatter_impl.dart

 // Copyright (c) 2013, 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 formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/parser.dart';
@@ skipping 928 matching lines @@
     token(node.keyword);
     space();
     visitCommaSeparatedNodes(node.interfaces);
   }
 
   visitImportDirective(ImportDirective node) {
     visitDirectiveMetadata(node.metadata);
     token(node.keyword);
     nonBreakingSpace();
     visit(node.uri);
+    token(node.deferredToken, precededBy: space);
     token(node.asToken, precededBy: space, followedBy: space);
     allowContinuedLines((){
       visit(node.prefix);
       visitNodes(node.combinators, precededBy: space, separatedBy: space);
     });
     token(node.semicolon);
   }
 
   visitIndexExpression(IndexExpression node) {
     if (node.isCascaded) {
@@ skipping 813 matching lines @@
     var lastLine =
         lineInfo.getLocation(lastOffset).lineNumber;
     var currentLine =
         lineInfo.getLocation(currentOffset).lineNumber;
     return currentLine - lastLine;
   }
 
   String toString() => writer.toString();
 
 }