Update shelf spacing in Chrome OS according to the MD specs

chrome/test/base/view_event_test_platform_part_chromeos.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 "chrome/test/base/view_event_test_platform_part.h"
 
 #include <memory>
 
 #include "ash/ash_switches.h"
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 68 matching lines @@
   ash::Shell::DeleteInstance();
   env_.reset();
 
   chromeos::NetworkHandler::Shutdown();
   chromeos::CrasAudioHandler::Shutdown();
   bluez::BluezDBusManager::Shutdown();
   chromeos::DBusThreadManager::Shutdown();
   // Ash Shell can't just live on its own without a browser process, we need to
   // also shut down the message center.
   message_center::MessageCenter::Shutdown();
+  ash::MaterialDesignController::Uninitialize();
 }
 
 }  // namespace
 
 // static
 ViewEventTestPlatformPart* ViewEventTestPlatformPart::Create(
     ui::ContextFactory* context_factory) {
   return new ViewEventTestPlatformPartChromeOS(context_factory);
 }