Hook up more import/exports in natives.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 30c6755b42deda493e429ab90cff06d9f173ff68..6060ea46aa04e24fc2c48bcad5e84f93bb094717 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1524,7 +1524,8 @@ bool Genesis::CallUtilsFunction(Isolate* isolate, const char* name) {
       isolate->factory()->NewStringFromAsciiChecked(name);
   Handle<Object> fun = JSObject::GetDataProperty(utils, name_string);
   Handle<Object> receiver = isolate->factory()->undefined_value();
-  return !Execution::Call(isolate, fun, receiver, 0, NULL).is_null();
+  Handle<Object> args[] = {utils};
+  return !Execution::Call(isolate, fun, receiver, 1, args).is_null();
 }
 
 
@@ -2423,6 +2424,8 @@ bool Genesis::InstallExperimentalNatives() {
 #undef INSTALL_EXPERIMENTAL_NATIVES
   }
 
+  CallUtilsFunction(isolate(), "PostExperimentals");
+
   InstallExperimentalNativeFunctions();
   return true;
 }