Add support for ordinal scroll amounts

ui/base/x/x11_util.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.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "ui/base/x/x11_util.h"
 
@@ skipping 558 matching lines @@
     // with one from the master and one from the slave so there will
     // always be at least one pending.
     if (!ui::TouchFactory::GetInstance()->ShouldProcessXI2Event(&next_event)) {
       XFreeEventData(display, &next_event.xcookie);
       XNextEvent(display, &next_event);
       continue;
     }
 
     if (next_event.type == GenericEvent &&
         next_event.xgeneric.evtype == event_type &&
-        !ui::GetScrollOffsets(&next_event, NULL, NULL, NULL)) {
+        !ui::GetScrollOffsets(&next_event, NULL, NULL, NULL, NULL, NULL)) {
       XIDeviceEvent* next_xievent =
           static_cast<XIDeviceEvent*>(next_event.xcookie.data);
 #if defined(USE_XI2_MT)
       float next_tracking_id = -1;
       if (event_type == XI_TouchUpdate) {
         // If this is a touch motion event (as opposed to mouse motion event),
         // then make sure the events are from the same touch-point.
         if (!ui::ValuatorTracker::GetInstance()->ExtractValuator(next_event,
               ui::ValuatorTracker::VAL_TRACKING_ID, &next_tracking_id))
           next_tracking_id = -1;
@@ skipping 1238 matching lines @@
       << "request_code " << static_cast<int>(error_event.request_code) << ", "
       << "minor_code " << static_cast<int>(error_event.minor_code)
       << " (" << request_str << ")";
 }
 
 // ----------------------------------------------------------------------------
 // End of x11_util_internal.h
 
 
 }  // namespace ui