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"
 #include "ash/shell.h"
 #include "ash/shell_init_params.h"
 #include "ash/test/ash_test_helper.h"
+#include "ash/test/material_design_controller_test_api.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/network/network_handler.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #include "ui/aura/env.h"
@@ skipping 55 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::test::MaterialDesignControllerTestAPI::Uninitialize();

[James Cook, 2016/06/13 21:43:17]

nit: Move this to line 82, so you uninitialize things in the opposite order to
how you initialize them.

[yiyix, 2016/06/14 05:55:27]

Will commit this change in a different CL because this is a fix for test cases.

 }
 
 }  // namespace
 
 // static
 ViewEventTestPlatformPart* ViewEventTestPlatformPart::Create(
     ui::ContextFactory* context_factory) {
   return new ViewEventTestPlatformPartChromeOS(context_factory);
 }