Explicitly coerce PostDispatchAction to uint32_t in DispatchEvent()

ui/views/controls/menu/menu_event_dispatcher_linux.cc

Index: ui/views/controls/menu/menu_event_dispatcher_linux.cc
diff --git a/ui/views/controls/menu/menu_event_dispatcher_linux.cc b/ui/views/controls/menu/menu_event_dispatcher_linux.cc
index 181ba241afeafb375aac569cd01d5101f7f0582a..46a76747862cf8cddf7ced9dde0e29127b912a55 100644
--- a/ui/views/controls/menu/menu_event_dispatcher_linux.cc
+++ b/ui/views/controls/menu/menu_event_dispatcher_linux.cc
@@ -83,8 +83,8 @@ uint32_t MenuEventDispatcher::DispatchEvent(const ui::PlatformEvent& event) {
   if (should_quit || menu_controller_->exit_type() != MenuController::EXIT_NONE)
     menu_controller_->TerminateNestedMessageLoop();
 
-  return should_perform_default ? ui::POST_DISPATCH_PERFORM_DEFAULT
-                                : ui::POST_DISPATCH_NONE;
+  return should_perform_default ? ui::kPostDispatchPerformDefault
+                                : ui::kPostDispatchNone;
 }
 
 }  // namespace internal