Update shelf spacing in Chrome OS according to the MD specs

chrome/test/base/view_event_test_platform_part_chromeos.cc

Index: chrome/test/base/view_event_test_platform_part_chromeos.cc
diff --git a/chrome/test/base/view_event_test_platform_part_chromeos.cc b/chrome/test/base/view_event_test_platform_part_chromeos.cc
index bdd8c12f5a69f17d72a251d0393852d29abc6466..dcb0c99adbe8e5daf6c4c77789641afd80e22f16 100644
--- a/chrome/test/base/view_event_test_platform_part_chromeos.cc
+++ b/chrome/test/base/view_event_test_platform_part_chromeos.cc
@@ -86,6 +86,7 @@ ViewEventTestPlatformPartChromeOS::~ViewEventTestPlatformPartChromeOS() {
   // 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