Move tray code from ui/chromeos/network/

ui/chromeos/material_design_icon_controller.h

Index: ui/chromeos/material_design_icon_controller.h
diff --git a/ui/chromeos/material_design_icon_controller.h b/ui/chromeos/material_design_icon_controller.h
deleted file mode 100644
index ca6ac609ccbacacd4c70d7fe0d00cdc2ccb32b33..0000000000000000000000000000000000000000
--- a/ui/chromeos/material_design_icon_controller.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2016 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.
-
-#ifndef UI_CHROMEOS_MATERIAL_DESIGN_ICON_CONTROLLER_H_
-#define UI_CHROMEOS_MATERIAL_DESIGN_ICON_CONTROLLER_H_
-
-#include "ui/chromeos/ui_chromeos_export.h"
-
-namespace ui {
-namespace md_icon_controller {
-
-// Sets whether or not material design versions of the network icons should
-// be used (WiFi, cellular network, VPN, and network badges). Called by
-// ash::MaterialDesignController upon initialization.
-UI_CHROMEOS_EXPORT void SetUseMaterialDesignNetworkIcons(bool use);
-
-// Returns true if material design versions of the network icons should
-// be used.
-UI_CHROMEOS_EXPORT bool UseMaterialDesignNetworkIcons();
-
-}  // namespace md_icon_controller
-}  // namespace ui
-
-#endif  // UI_CHROMEOS_MATERIAL_DESIGN_ICON_CONTROLLER_H_