bindings: Adds check for attributes on prototype chains in CSSStyleDeclaration.

Source/bindings/templates/interface_base.cpp

 {% include 'copyright_block.txt' %}
 #include "config.h"
 {% filter conditional(conditional_string) %}
 #include "{{v8_class_or_partial}}.h"
 
 {% for filename in cpp_includes if filename != '%s.h' % cpp_class_or_partial %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
@@ skipping 375 matching lines @@
            '%sV8Internal::namedPropertyQueryCallback' % cpp_class
            if named_property_getter.is_enumerable else '0' %}
     {% set named_property_deleter_callback =
            '%sV8Internal::namedPropertyDeleterCallback' % cpp_class
            if named_property_deleter else '0' %}
     {% set named_property_enumerator_callback =
            '%sV8Internal::namedPropertyEnumeratorCallback' % cpp_class
            if named_property_getter.is_enumerable else '0' %}
     {
         v8::NamedPropertyHandlerConfiguration config({{named_property_getter_callback}}, {{named_property_setter_callback}}, {{named_property_query_callback}}, {{named_property_deleter_callback}}, {{named_property_enumerator_callback}});
-        {% if not named_property_getter.is_custom %}
+        {# TODO(yukishiino): Determine how to treat Window interface. #}
+        {% if interface_name != 'Window' %}
         config.flags = static_cast<v8::PropertyHandlerFlags>(static_cast<int>(config.flags) | static_cast<int>(v8::PropertyHandlerFlags::kOnlyInterceptStrings));
         {% endif %}
         {% if named_property_getter.do_not_check_security %}
         config.flags = v8::PropertyHandlerFlags::kAllCanRead;
         {% endif %}
-        {% if not is_override_builtins and not named_property_getter.is_custom %}
+        {# TODO(yukishiino): Determine how to treat Window interface. #}
+        {% if not is_override_builtins and interface_name != 'Window' %}
         config.flags = static_cast<v8::PropertyHandlerFlags>(static_cast<int>(config.flags) | static_cast<int>(v8::PropertyHandlerFlags::kNonMasking));
         {% endif %}
         functionTemplate->{{set_on_template}}()->SetHandler(config);
     }
     {% endif %}
     {% if iterator_method %}
     {% filter per_context_enabled(iterator_method.per_context_enabled_function) %}
     {% filter exposed(iterator_method.exposed_test) %}
     {% filter runtime_enabled(iterator_method.runtime_enabled_function) %}
     static const V8DOMConfiguration::SymbolKeyedMethodConfiguration symbolKeyedIteratorConfiguration = { v8::Symbol::GetIterator, {{cpp_class_or_partial}}V8Internal::iteratorMethodCallback, 0, V8DOMConfiguration::ExposedToAllScripts };
@@ skipping 86 matching lines @@
 {% endfor %}
 {% for attribute in attributes if attribute.is_implemented_in_private_script %}
 {{attribute_getter_implemented_in_private_script(attribute)}}
 {% if attribute.has_setter %}
 {{attribute_setter_implemented_in_private_script(attribute)}}
 {% endif %}
 {% endfor %}
 {% block partial_interface %}{% endblock %}
 } // namespace blink
 {% endfilter %}