[forbots] IWYU for ax_enums.h

ash/system/user/button_from_view.cc

 // 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.
 
 #include "ash/system/user/button_from_view.h"
 
 #include "ash/ash_constants.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_utils.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/layout/box_layout.h"
 
 namespace ash {
 
 namespace {
 
@@ skipping 80 matching lines @@
         button_hovered_ ? kHoverBackgroundColor : kBackgroundColor;
     content_->set_background(
         views::Background::CreateSolidBackground(background_color));
     set_background(views::Background::CreateSolidBackground(background_color));
   }
   SchedulePaint();
 }
 
 }  // namespace tray
 }  // namespace ash