mash: Move TrayUpdate to //ash/common

ash/common/system/update/tray_update.cc

 // Copyright (c) 2012 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/tray_update.h"
+#include "ash/common/system/update/tray_update.h"
 
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/wm_system_tray_notifier.h"
 #include "ash/common/wm_shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
-#include "ui/aura/window.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
-#include "ui/views/widget/widget.h"
 
 namespace {
 
 int DecideResource(ash::UpdateInfo::UpdateSeverity severity, bool dark) {
   switch (severity) {
     case ash::UpdateInfo::UPDATE_NORMAL:
       return dark ? IDR_AURA_UBER_TRAY_UPDATE_DARK:
                     IDR_AURA_UBER_TRAY_UPDATE;
 
     case ash::UpdateInfo::UPDATE_LOW_GREEN:
@@ skipping 74 matching lines @@
   WmShell::Get()->system_tray_delegate()->GetSystemUpdateInfo(&info);
   return info.update_required ? new UpdateView(info) : nullptr;
 }
 
 void TrayUpdate::OnUpdateRecommended(const UpdateInfo& info) {
   SetImageFromResourceId(DecideResource(info.severity, false));
   tray_view()->SetVisible(true);
 }
 
 }  // namespace ash