Move tray code from ui/chromeos/network/

ui/chromeos/material_design_icon_controller.cc

Index: ui/chromeos/material_design_icon_controller.cc
diff --git a/ui/chromeos/material_design_icon_controller.cc b/ui/chromeos/material_design_icon_controller.cc
deleted file mode 100644
index c06141e2faa16b554c0a4888e43e171d5284c0ad..0000000000000000000000000000000000000000
--- a/ui/chromeos/material_design_icon_controller.cc
+++ /dev/null
@@ -1,23 +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.
-
-#include "ui/chromeos/material_design_icon_controller.h"
-
-namespace ui {
-namespace md_icon_controller {
-
-namespace {
-bool use_md_network_icons = false;
-}  // namespace
-
-void SetUseMaterialDesignNetworkIcons(bool use) {
-  use_md_network_icons = use;
-}
-
-bool UseMaterialDesignNetworkIcons() {
-  return use_md_network_icons;
-}
-
-}  // namespace md_icon_controller
-}  // namespace ui