Don't handle NaturalScroll in Chrome but pass it to CMT instead

chrome/browser/chromeos/login/login_display_host_impl.cc

Index: chrome/browser/chromeos/login/login_display_host_impl.cc
diff --git a/chrome/browser/chromeos/login/login_display_host_impl.cc b/chrome/browser/chromeos/login/login_display_host_impl.cc
index 89ec4c8c34765536c9d06447ca7c9c26f6794333..d12d3ec02da5b1e262d501ba594f283cdbee0613 100644
--- a/chrome/browser/chromeos/login/login_display_host_impl.cc
+++ b/chrome/browser/chromeos/login/login_display_host_impl.cc
@@ -1054,9 +1054,9 @@ void ShowLoginWizard(const std::string& first_screen_name) {
     system::InputDeviceSettings::Get()->SetTapToClick(
         prefs->GetBoolean(prefs::kOwnerTapToClickEnabled));
   }
-
-  ui::SetNaturalScroll(CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kNaturalScrollDefault));
+  system::InputDeviceSettings::Get()->SetNaturalScroll(
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kNaturalScrollDefault));
 
   gfx::Rect screen_bounds(chromeos::CalculateScreenBounds(gfx::Size()));