Have bindings layer assume and insist that all interface types are GCed.

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

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% block indexed_property_getter %}
 {% if indexed_property_getter and not indexed_property_getter.is_custom %}
 {% set getter = indexed_property_getter %}
 static void indexedPropertyGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
@@ skipping 446 matching lines @@
 {% from 'methods.cpp' import generate_constructor with context %}
 {% if named_constructor %}
 {% set to_active_scriptwrappable = '%s::toActiveScriptWrappable' % v8_class
                                    if active_scriptwrappable else '0' %}
 // Suppress warning: global constructors, because struct WrapperTypeInfo is trivial
 // and does not depend on another global objects.
 #if defined(COMPONENT_BUILD) && defined(WIN32) && COMPILER(CLANG)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wglobal-constructors"
 #endif
-const WrapperTypeInfo {{v8_class}}Constructor::wrapperTypeInfo = { gin::kEmbedderBlink, {{v8_class}}Constructor::domTemplate, {{v8_class}}::refObject, {{v8_class}}::derefObject, {{v8_class}}::trace, {{to_active_scriptwrappable}}, 0, {{v8_class}}::preparePrototypeAndInterfaceObject, {{v8_class}}::installConditionallyEnabledProperties, "{{interface_name}}", 0, WrapperTypeInfo::WrapperTypeObjectPrototype, WrapperTypeInfo::{{wrapper_class_id}}, WrapperTypeInfo::{{event_target_inheritance}}, WrapperTypeInfo::{{lifetime}}, WrapperTypeInfo::{{gc_type}} };
+const WrapperTypeInfo {{v8_class}}Constructor::wrapperTypeInfo = { gin::kEmbedderBlink, {{v8_class}}Constructor::domTemplate, {{v8_class}}::trace, {{to_active_scriptwrappable}}, 0, {{v8_class}}::preparePrototypeAndInterfaceObject, {{v8_class}}::installConditionallyEnabledProperties, "{{interface_name}}", 0, WrapperTypeInfo::WrapperTypeObjectPrototype, WrapperTypeInfo::{{wrapper_class_id}}, WrapperTypeInfo::{{event_target_inheritance}}, WrapperTypeInfo::{{lifetime}} };
 #if defined(COMPONENT_BUILD) && defined(WIN32) && COMPILER(CLANG)
 #pragma clang diagnostic pop
 #endif
 
 {{generate_constructor(named_constructor)}}
 v8::Local<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);
@@ skipping 436 matching lines @@
 ActiveScriptWrappable* {{v8_class}}::toActiveScriptWrappable(v8::Local<v8::Object> wrapper)
 {
     return toImpl(wrapper);
 }
 
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
-{% block ref_object_and_deref_object %}
-void {{v8_class}}::refObject(ScriptWrappable* scriptWrappable)
-{
-{% if gc_type == 'RefCountedObject' %}
-    scriptWrappable->toImpl<{{cpp_class}}>()->ref();
-{% endif %}
-}
-
-void {{v8_class}}::derefObject(ScriptWrappable* scriptWrappable)
-{
-{% if gc_type == 'RefCountedObject' %}
-    scriptWrappable->toImpl<{{cpp_class}}>()->deref();
-{% endif %}
-}
-
-{% endblock %}
-
-{##############################################################################}
 {% block partial_interface %}
 {% if has_partial_interface %}
 InstallTemplateFunction {{v8_class}}::install{{v8_class}}TemplateFunction = (InstallTemplateFunction)&{{v8_class}}::install{{v8_class}}Template;
 
 void {{v8_class}}::updateWrapperTypeInfo(InstallTemplateFunction installTemplateFunction, PreparePrototypeAndInterfaceObjectFunction preparePrototypeAndInterfaceObjectFunction)
 {
     {{v8_class}}::install{{v8_class}}TemplateFunction = installTemplateFunction;
     if (preparePrototypeAndInterfaceObjectFunction)
         {{v8_class}}::wrapperTypeInfo.preparePrototypeAndInterfaceObjectFunction = preparePrototypeAndInterfaceObjectFunction;
 }
 
 {% for method in methods if method.overloads and method.overloads.has_partial_overloads %}
 void {{v8_class}}::register{{method.name | blink_capitalize}}MethodForPartialInterface(void (*method)(const v8::FunctionCallbackInfo<v8::Value>&))
 {
     {{cpp_class}}V8Internal::{{method.name}}MethodForPartialInterface = method;
 }
 
 {% endfor %}
 {% endif %}
 {% endblock %}