Remove Nested Message Loop from MenuController

ui/views/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 import("//ui/ozone/ozone.gni")
 import("//ui/vector_icons/vector_icons.gni")
@@ skipping 165 matching lines @@
     "controls/menu/menu_host.h",
     "controls/menu/menu_host_root_view.cc",
     "controls/menu/menu_host_root_view.h",
     "controls/menu/menu_image_util.cc",
     "controls/menu/menu_image_util.h",
     "controls/menu/menu_insertion_delegate_win.h",
     "controls/menu/menu_item_view.cc",
     "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",
     "controls/menu/menu_runner.h",
     "controls/menu/menu_runner_handler.h",
     "controls/menu/menu_runner_impl.cc",
     "controls/menu/menu_runner_impl.h",
     "controls/menu/menu_runner_impl_adapter.cc",
     "controls/menu/menu_runner_impl_adapter.h",
     "controls/menu/menu_runner_impl_cocoa.h",
@@ skipping 332 matching lines @@
       "accessibility/ax_view_obj_wrapper.h",
       "accessibility/ax_widget_obj_wrapper.cc",
       "accessibility/ax_widget_obj_wrapper.h",
       "accessibility/ax_window_obj_wrapper.cc",
       "accessibility/ax_window_obj_wrapper.h",
       "bubble/bubble_window_targeter.cc",
       "bubble/bubble_window_targeter.h",
       "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",
       "controls/native/native_view_host_aura.h",
       "corewm/cursor_height_provider_win.cc",
       "corewm/cursor_height_provider_win.h",
       "corewm/tooltip.h",
       "corewm/tooltip_aura.cc",
       "corewm/tooltip_aura.h",
       "corewm/tooltip_controller.cc",
@@ skipping 517 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }