workaround for strange bug in Chrome 32

pkg/polymer/lib/src/declaration.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.
 
 part of polymer;
 
 /**
  * **Warning**: this class is experiental and subject to change.
  *
  * The implementation for the `polymer-element` element.
@@ skipping 513 matching lines @@
 }
 
 DeclarationMirror _getProperty(ClassMirror cls, Symbol property) {
   do {
     var mirror = cls.declarations[property];
     if (mirror is MethodMirror && mirror.isGetter && _hasSetter(cls, mirror)
         || mirror is VariableMirror) {
       return mirror;
     }
     cls = cls.superclass;
-  } while (cls != null);
+
+    // It's generally a good idea to stop at Object, since we know it doesn't
+    // have what we want.
+    // TODO(jmesserly): This is also a workaround for what appears to be a V8
+    // bug introduced between Chrome 31 and 32. After 32
+    // JsClassMirror.declarations on Object calls
+    // JsClassMirror.typeVariables, which tries to get the _jsConstructor's
+    // .prototype["<>"]. This ends up getting the "" property instead, maybe
+    // because "<>" doesn't exist, and gets ";" which then blows up because
+    // the code later on expects a List of ints.
+  } while (cls != _objectType);
   return null;
 }
 
 bool _hasSetter(ClassMirror cls, MethodMirror getter) {
   var setterName = new Symbol('${MirrorSystem.getName(getter.simpleName)}=');
   var mirror = cls.declarations[setterName];
   return mirror is MethodMirror && mirror.isSetter;
 }
 
 
@@ skipping 95 matching lines @@
   return map;
 }();
 
 // Dart note: we need this function because we have additional renames JS does
 // not have. The JS renames are simply case differences, whereas we have ones
 // like doubleclick -> dblclick and stripping the webkit prefix.
 String _eventNameFromType(String eventType) {
   final result = _reverseEventTranslations[eventType];
   return result != null ? result : eventType;
 }