mash: Move TrayUpdate to //ash/common

ash/common/system/update/tray_update.cc

Index: ash/common/system/update/tray_update.cc
diff --git a/ash/system/tray_update.cc b/ash/common/system/update/tray_update.cc
similarity index 97%
rename from ash/system/tray_update.cc
rename to ash/common/system/update/tray_update.cc
index 1fe698b6252f49f6da34d5c49890ee8f67510fd2..5eaac96ef2c5d945f5867f0d05c6adf3daa890da 100644
--- a/ash/system/tray_update.cc
+++ b/ash/common/system/update/tray_update.cc
@@ -2,7 +2,7 @@
 // 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"
@@ -12,13 +12,11 @@
 #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 {