diff -up chromium-58.0.3029.96/ui/events/devices/x11/device_data_manager_x11.cc.revert chromium-58.0.3029.96/ui/events/devices/x11/device_data_manager_x11.cc

--- chromium-58.0.3029.96/ui/events/devices/x11/device_data_manager_x11.cc.revert	2017-05-08 14:58:11.767482431 -0400

+++ chromium-58.0.3029.96/ui/events/devices/x11/device_data_manager_x11.cc	2017-05-08 14:58:37.722960109 -0400

@@ -790,15 +790,6 @@ void DeviceDataManagerX11::UpdateScrollC

   DCHECK(deviceid >= 0 && deviceid < kMaxDeviceNum);

   ScrollInfo& info = scroll_data_[deviceid];

-  bool legacy_scroll_available =

-      (scroll_class_info->flags & XIScrollFlagNoEmulation) == 0;

-  // If the device's highest resolution is lower than the resolution of xinput1

-  // then use xinput1's events instead (ie. don't configure smooth scrolling).

-  if (legacy_scroll_available &&

-      std::abs(scroll_class_info->increment) <= 1.0) {

-    return;

-  }

-

   switch (scroll_class_info->scroll_type) {

     case XIScrollTypeVertical:

       info.vertical.number = scroll_class_info->number;