[Bindings] Update runtime enabled features from partial interfaces

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

 {% extends 'interface_base.cpp.tmpl' %}
 
 {% set has_prepare_prototype_and_interface_object =
     unscopables or has_conditional_attributes_on_prototype or
     methods | conditionally_exposed(is_partial) %}
 {% set prepare_prototype_and_interface_object_func =
     '%s::preparePrototypeAndInterfaceObject' % v8_class
     if has_prepare_prototype_and_interface_object
     else 'nullptr' %}
 
@@ skipping 902 matching lines @@
 {% endfilter %}{# runtime_enabled #}
 {% endfilter %}{# secure_context #}
 {% endfilter %}{# exposed #}
 {% endfor %}
 {% endmacro %}
 
 
 {##############################################################################}
 {% block partial_interface %}
 {% if has_partial_interface %}
+{% if needs_runtime_enabled_installer %}
+InstallRuntimeEnabledFunction {{v8_class}}::install{{v8_class}}RuntimeEnabledFunction = (InstallRuntimeEnabledFunction)&{{v8_class}}::installRuntimeEnabledFeatures;

[Yuki, 2017/02/13 12:15:03]

nit: Better avoid casting.

+{% endif %}
+
 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;
+void {{v8_class}}::updateWrapperTypeInfo(
+    InstallTemplateFunction installTemplateFunction,
+    InstallRuntimeEnabledFunction installRuntimeEnabledFunction,
+    PreparePrototypeAndInterfaceObjectFunction preparePrototypeAndInterfaceObjectFunction) {
+  ALLOW_UNUSED_LOCAL(installRuntimeEnabledFunction);
+
+  {{v8_class}}::install{{v8_class}}TemplateFunction =
+      installTemplateFunction;
+  {% if needs_runtime_enabled_installer %}
+  CHECK(installRuntimeEnabledFunction);
+  {{v8_class}}::install{{v8_class}}RuntimeEnabledFunction =
+      installRuntimeEnabledFunction;
+  {% endif %}
+  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 %}