Oilpan: add [WillBeGarbageCollected] for Element.

Source/bindings/templates/interface.cpp

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% macro attribute_configuration(attribute) %}
 {% set getter_callback =
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class, attribute.name)
        if not attribute.constructor_type else
        ('%sV8Internal::%sConstructorGetterCallback' %
@@ skipping 544 matching lines @@
 
 
 {##############################################################################}
 {% from 'methods.cpp' import named_constructor_callback with context %}
 {% block named_constructor %}
 {% if named_constructor %}
 {% set to_active_dom_object = '%s::toActiveDOMObject' % v8_class
                               if is_active_dom_object else '0' %}
 {% set to_event_target = '%s::toEventTarget' % v8_class
                          if is_event_target else '0' %}
-const WrapperTypeInfo {{v8_class}}Constructor::wrapperTypeInfo = { gin::kEmbedderBlink, {{v8_class}}Constructor::domTemplate, {{v8_class}}::derefObject, {{to_active_dom_object}}, {{to_event_target}}, 0, {{v8_class}}::installPerContextEnabledMethods, 0, WrapperTypeObjectPrototype, RefCountedObject };
+const WrapperTypeInfo {{v8_class}}Constructor::wrapperTypeInfo = { gin::kEmbedderBlink, {{v8_class}}Constructor::domTemplate, {{v8_class}}::derefObject, {{to_active_dom_object}}, {{to_event_target}}, 0, {{v8_class}}::installPerContextEnabledMethods, 0, WrapperTypeObjectPrototype, {{gc_type}} };
 
 {{named_constructor_callback(named_constructor)}}
 v8::Handle<v8::FunctionTemplate> {{v8_class}}Constructor::domTemplate(v8::Isolate* isolate)
 {
     static int domTemplateKey; // This address is used for a key to look up the dom template.
     V8PerIsolateData* data = V8PerIsolateData::from(isolate);
     v8::Local<v8::FunctionTemplate> result = data->existingDOMTemplate(&domTemplateKey);
     if (!result.IsEmpty())
         return result;
 
@@ skipping 759 matching lines @@
 {% endif %}
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline({{cpp_class}}* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 {% endblock %}