Rename elements after sorting.

tests/compiler/dart2js/unparser_test.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.
 
 #import('dart:uri');
 #import('parser_helper.dart');
 #import('mock_compiler.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/dart_backend/dart_backend.dart");
 #import("../../../lib/compiler/implementation/elements/elements.dart");
@@ skipping 484 matching lines @@
 
 main() {
   new I();
   new A();
 
   new mylib.I();
   new mylib.A();
 }
 ''';
   var expectedResult =
-    'interface p_I default B{p_I();}'
-    'class A implements p_I{A(){}}'
-    'class B{factory p_I(){}}'
-    'interface I default p_B{I();}'
-    'class p_A implements I{p_A(){}}'
-    'class p_B{factory I(){}}'
-    'main(){new I(); new p_A(); new p_I(); new A();}';
+    'interface I default B{I();}'
+    'class A implements I{A(){}}'
+    'class B{factory I(){}}'
+    'interface p_I default p_B{p_I();}'
+    'class p_A implements p_I{p_A(){}}'
+    'class p_B{factory p_I(){}}'
+    'main(){new p_I(); new p_A(); new I(); new A();}';
   testDart2DartWithLibrary(mainSrc, librarySrc,
       (String result) { Expect.equals(expectedResult, result); });
 }
 
 main() {
   testSignedConstants();
   testGenericTypes();
   testForLoop();
   testEmptyList();
   testClosure();
@@ skipping 16 matching lines @@
   testNoConflictSendsRename();
   testConflictLibraryClassRename();
   testDefaultClassWithArgs();
   testClassExtendsWithArgs();
   testStaticInvocation();
   testLibraryGetSet();
   testFieldTypeOutput();
   testDefaultClassNamePlaceholder();
   testFactoryRename();
 }