Also use transition types when constructing Events that raise exceptions.

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
        '{0}V8Internal::{0}ConstructorGetter'.format(cpp_class) %}
@@ skipping 625 matching lines @@
         }
         {# Store attributes of type |any| on the wrapper to avoid leaking them
            between isolated worlds. #}
         {% for attribute in any_type_attributes %}
         options.get("{{attribute.name}}", {{attribute.name}});
         if (!{{attribute.name}}.IsEmpty())
             setHiddenValue(info.GetIsolate(), info.Holder(), "{{attribute.name}}", {{attribute.name}});
         {% endfor %}
     }
     {% if is_constructor_raises_exception %}
-    RefPtr<{{cpp_class}}> event = {{cpp_class}}::create(type, eventInit, exceptionState);
+    RefPtrWillBeRawPtr<{{cpp_class}}> event = {{cpp_class}}::create(type, eventInit, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     {% else %}
     RefPtrWillBeRawPtr<{{cpp_class}}> event = {{cpp_class}}::create(type, eventInit);
     {% endif %}
     {% if any_type_attributes and not interface_name == 'ErrorEvent' %}
     {# If we're in an isolated world, create a SerializedScriptValue and store
        it in the event for later cloning if the property is accessed from
        another world. The main world case is handled lazily (in custom code).
 
@@ skipping 663 matching lines @@
 {% endfilter %}
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline({{cpp_class}}* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 {% endblock %}