Natural scroll on by default on oobe as well.

chrome/browser/chromeos/preferences.cc

 // Copyright (c) 2012 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/browser/chromeos/preferences.h"
 
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
@@ skipping 59 matching lines @@
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kTapDraggingEnabled,
                              false,
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerClick,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerSwipe,
                              false,
                              PrefService::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kNaturalScroll,
-                             false,
-                             PrefService::SYNCABLE_PREF);
+  prefs->RegisterBooleanPref(
+      prefs::kNaturalScroll,
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kNaturalScrollDefault),
+      PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPrimaryMouseButtonRight,
                              false,
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kLabsMediaplayerEnabled,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kLabsAdvancedFilesystemEnabled,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   // Check if the accessibility pref is already registered, which can happen
@@ skipping 670 matching lines @@
 
   input_method::AutoRepeatRate rate;
   rate.initial_delay_in_ms = xkb_auto_repeat_delay_pref_.GetValue();
   rate.repeat_interval_in_ms = xkb_auto_repeat_interval_pref_.GetValue();
   DCHECK(rate.initial_delay_in_ms > 0);
   DCHECK(rate.repeat_interval_in_ms > 0);
   input_method::XKeyboard::SetAutoRepeatRate(rate);
 }
 
 }  // namespace chromeos