Hide linter warning for auto-binding-dart.

pkg/polymer/test/build/linter_test.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 polymer.test.linter_test;
 
 import 'package:polymer/src/build/common.dart';
 import 'package:polymer/src/build/linter.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 497 matching lines @@
         'warning: definition for Polymer element with tag name "x-foo" not '
         'found. (lib/test.html 0 0)'
       ]);
 
     _testLinter('tag exists (type extension)', {
         'a|lib/test.html': '<div is="x-foo"></div>',
       }, [
         'warning: definition for Polymer element with tag name "x-foo" not '
         'found. (lib/test.html 0 0)'
       ]);
+    
+    _testLinter('tag exists (internally defined in code)', {
+      'a|lib/test.html': '<div is="auto-binding-dart"></div>',
+      }, []);
 
     _testLinter('used correctly (no base tag)', {
         'a|lib/test.html': '''
             <link rel="import" href="../../packages/polymer/polymer.html">
             <polymer-element name="x-a"></polymer-element>
             <x-a></x-a>
             '''.replaceAll('            ', ''),
       }, []);
 
     _testLinter('used incorrectly (no base tag)', {
@@ skipping 117 matching lines @@
 
 _testLinter(String name, Map inputFiles, List outputMessages,
     [bool solo = false]) {
   var linter = new Linter(new TransformOptions());
   var outputFiles = {};
   if (outputMessages.every((m) => m.startsWith('warning:'))) {
     inputFiles.forEach((k, v) => outputFiles[k] = v);
   }
   testPhases(name, [[linter]], inputFiles, outputFiles, outputMessages, solo);
 }