Remove Nested Message Loop from MenuController

ui/views/BUILD.gn

Index: ui/views/BUILD.gn
diff --git a/ui/views/BUILD.gn b/ui/views/BUILD.gn
index bce4386e53349900bbe4f03d24a1a72aa1cd7f4a..e83f5b971dae51dcd218ab7f6538042e95bd84c0 100644
--- a/ui/views/BUILD.gn
+++ b/ui/views/BUILD.gn
@@ -183,9 +183,6 @@ component("views") {
     "controls/menu/menu_item_view.h",
     "controls/menu/menu_listener.cc",
     "controls/menu/menu_listener.h",
-    "controls/menu/menu_message_loop.h",
-    "controls/menu/menu_message_loop_mac.cc",
-    "controls/menu/menu_message_loop_mac.h",
     "controls/menu/menu_model_adapter.cc",
     "controls/menu/menu_model_adapter.h",
     "controls/menu/menu_runner.cc",
@@ -538,8 +535,6 @@ component("views") {
       "bubble/tray_bubble_view.cc",
       "bubble/tray_bubble_view.h",
       "controls/menu/display_change_listener_aura.cc",
-      "controls/menu/menu_message_loop_aura.cc",
-      "controls/menu/menu_message_loop_aura.h",
       "controls/menu/menu_pre_target_handler.cc",
       "controls/menu/menu_pre_target_handler.h",
       "controls/native/native_view_host_aura.cc",