Added a command line switch to disable xinput2, enabled xinput2 by default

ui/events/devices/x11/ui_events_devices_x11_switches.h

Index: ui/events/devices/x11/ui_events_devices_x11_switches.h
diff --git a/ui/events/devices/x11/ui_events_devices_x11_switches.h b/ui/events/devices/x11/ui_events_devices_x11_switches.h
new file mode 100644
index 0000000000000000000000000000000000000000..ad164d802881b04a68e346cea5b4dfbcac090d34
--- /dev/null
+++ b/ui/events/devices/x11/ui_events_devices_x11_switches.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2016 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.
+
+// Defines all the command-line switches used by ui/base.
+
+#ifndef UI_EVENTS_DEVICES_X11_UI_EVENTS_DEVICES_X11_SWITCHES_H_
+#define UI_EVENTS_DEVICES_X11_UI_EVENTS_DEVICES_X11_SWITCHES_H_
+
+namespace switches {
+
+#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
+extern const char kDisableHighPrecisionScrolling[];

[bokan, 2016/07/20 13:27:04]

Adding a file just for this is probably overkill. I would just put this in
ui/events/event_switches.cc

+#endif
+
+}  // namespace switches
+
+#endif  // UI_EVENTS_DEVICES_X11_UI_EVENTS_DEVICES_X11_SWITCHES_H_