Add LibraryDependencyMirror.isDeferred.

tests/lib/mirrors/stringify.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.
 
 /// Helper methods for converting a [Mirror] to a [String].
 library test.stringify;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
@@ skipping 109 matching lines @@
       n(a.targetLibrary.simpleName).compareTo(n(b.targetLibrary.simpleName));
   compareCom(a, b) => n(a.identifier).compareTo(n(b.identifier));
   compareFirst(a, b) => a[0].compareTo(b[0]);
   sortBy(c, p) => new List.from(c)..sort(p);
 
   var buffer = new StringBuffer();
   sortBy(l.libraryDependencies, compareDep).forEach((dep) {
     if (dep.isImport) buffer.write('import ');
     if (dep.isExport) buffer.write('export ');
     buffer.write(n(dep.targetLibrary.simpleName));
+    if (dep.isDeferred) buffer.write(' deferred');
     if (dep.prefix != null) buffer.write(' as ${n(dep.prefix)}');
     buffer.write('\n');
 
     List flattenedCombinators = new List();
     dep.combinators.forEach((com) {
       com.identifiers.forEach((ident) {
         flattenedCombinators.add([n(ident), com.isShow, com.isHide]);
       });
     });
     sortBy(flattenedCombinators, compareFirst).forEach((triple) {
@@ skipping 28 matching lines @@
   Expect.stringEquals(expected, stringify(actual), reason);
 }
 
 compareSymbols(Symbol a, Symbol b) {
   return MirrorSystem.getName(a).compareTo(MirrorSystem.getName(b));
 }
 
 simpleNames(Iterable<Mirror> i) => i.map((e) => e.simpleName);
 
 sort(Iterable<Symbol> symbols) => symbols.toList()..sort(compareSymbols);