Add Custom Named property getters for cssStyleDeclaration to determine the existence of a property.

Source/bindings/dart/scripts/templates/interface_h.template

 // 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.
 
 // WARNING: Do not edit - generated code.
 
 #ifndef {{dart_class}}_h
 #define {{dart_class}}_h
 
 {% filter conditional(conditional_string) %}
@@ skipping 153 matching lines @@
 
   {% for attribute in attributes %}
     {% if attribute.has_custom_getter %}
   void {{attribute.name}}Getter(Dart_NativeArguments);
     {% endif %}
     {% if attribute.has_custom_setter %}
   void {{attribute.name}}Setter(Dart_NativeArguments); 
     {% endif %}
   {% endfor %}
 
+  {% if dart_class == 'DartCSSStyleDeclaration' %}
+  // TODO(efortuna): Pull in custom functions in a less hacky way!
+  void propertyQuery(Dart_NativeArguments args);
+  {% endif %}
+
 }
 
 }  // namespace WebCore
 
 {% endfilter %}
 
 #endif // {{dart_class}}_h