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

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index 4979adf002bdcf58994de67ef5c13957b880d3ad..4dfc6420a8feb845e3dd5842961361fbdfd7a721 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -65,7 +65,6 @@
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chrome/browser/chromeos/settings/owner_key_util.h"
 #include "chrome/browser/chromeos/status/data_promo_notification.h"
-#include "chrome/browser/chromeos/system/input_device_settings.h"
 #include "chrome/browser/chromeos/upgrade_detector_chromeos.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/metrics/metrics_service.h"
@@ -715,7 +714,7 @@
   if (ui::ShouldDefaultToNaturalScroll()) {
     CommandLine::ForCurrentProcess()->AppendSwitch(
         chromeos::switches::kNaturalScrollDefault);
-    system::InputDeviceSettings::Get()->SetTapToClick(true);
+    ui::SetNaturalScroll(true);
   }
 
   ChromeBrowserMainPartsLinux::PreBrowserStart();