[Origin Trials] Allow static attributes to be defined on origin trials

third_party/WebKit/Source/bindings/templates/interface_base.cpp

 {% include 'copyright_block.txt' %}
 #include "{{v8_class_or_partial}}.h"
 
 {% for filename in cpp_includes if filename != '%s.h' % cpp_class_or_partial %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 {% set to_active_scriptwrappable = '%s::toActiveScriptWrappable' % v8_class
                                    if active_scriptwrappable else '0' %}
@@ skipping 363 matching lines @@
     v8::Local<v8::Object> prototype = instance->GetPrototype()->ToObject(scriptState->isolate());
 
     {# Origin-Trial-enabled attributes #}
     {% if attributes | for_origin_trial_feature(origin_trial_feature_name) or
           methods | method_for_origin_trial_feature(origin_trial_feature_name, is_partial) %}
     V8PerIsolateData* perIsolateData = V8PerIsolateData::from(scriptState->isolate());
     v8::Local<v8::FunctionTemplate> interfaceTemplate = perIsolateData->findInterfaceTemplate(scriptState->world(), &{{v8_class}}::wrapperTypeInfo);
     v8::Local<v8::Signature> signature = v8::Signature::New(scriptState->isolate(), interfaceTemplate);
     ALLOW_UNUSED_LOCAL(signature);
     {% endif %}
-    {% if constants | for_origin_trial_feature(origin_trial_feature_name) or
-          methods | method_for_origin_trial_feature(origin_trial_feature_name, is_partial) %}
     V8PerContextData* perContextData = V8PerContextData::from(scriptState->context());
     v8::Local<v8::Function> interface = perContextData->constructorForType(&{{v8_class}}::wrapperTypeInfo);
-    {% endif %}
+    ALLOW_UNUSED_LOCAL(interface);
     {% for attribute in attributes | for_origin_trial_feature(origin_trial_feature_name) | unique_by('name') | sort %}
     {% if attribute.is_data_type_property %}
     const V8DOMConfiguration::AttributeConfiguration attribute{{attribute.name}}Configuration = \
         {{attribute_configuration(attribute)}};
     V8DOMConfiguration::installAttribute(scriptState->isolate(), scriptState->world(), instance, prototype, attribute{{attribute.name}}Configuration);
     {% else %}
     const V8DOMConfiguration::AccessorConfiguration accessor{{attribute.name}}Configuration = \
         {{attribute_configuration(attribute)}};
-    V8DOMConfiguration::installAccessor(scriptState->isolate(), scriptState->world(), instance, prototype, v8::Local<v8::Function>(), signature, accessor{{attribute.name}}Configuration);
+    V8DOMConfiguration::installAccessor(scriptState->isolate(), scriptState->world(), instance, prototype, interface, signature, accessor{{attribute.name}}Configuration);
     {% endif %}
     {% endfor %}
     {# Origin-Trial-enabled constants #}
     {% for constant in constants | for_origin_trial_feature(origin_trial_feature_name) | unique_by('name') | sort %}
     {% set constant_name = constant.name.title().replace('_', '') %}
     const V8DOMConfiguration::ConstantConfiguration constant{{constant_name}}Configuration = {{constant_configuration(constant)}};
     V8DOMConfiguration::installConstant(scriptState->isolate(), interface, prototype, constant{{constant_name}}Configuration);
     {% endfor %}
     {# Origin-Trial-enabled methods (no overloads) #}
     {% for method in methods | method_for_origin_trial_feature(origin_trial_feature_name, is_partial) | unique_by('name') | sort %}
@@ skipping 19 matching lines @@
 {{method_implemented_in_private_script(method)}}
 {% 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