Remove GestureScrollUpdateWithoutPropagation event (blink)

Source/platform/scroll/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 335 matching lines @@
         setPressedPart(theme()->hitTest(this, evt.position()));
         m_pressedPos = orientation() == HorizontalScrollbar ? convertFromContainingWindow(evt.position()).x() : convertFromContainingWindow(evt.position()).y();
         return true;
     case PlatformEvent::GestureTapDownCancel:
     case PlatformEvent::GestureScrollBegin:
         if (m_pressedPart != ThumbPart)
             return false;
         m_scrollPos = m_pressedPos;
         return true;
     case PlatformEvent::GestureScrollUpdate:
-    case PlatformEvent::GestureScrollUpdateWithoutPropagation:
         if (m_pressedPart != ThumbPart)
             return false;
         m_scrollPos += orientation() == HorizontalScrollbar ? evt.deltaX() : evt.deltaY();
         moveThumb(m_scrollPos, false);
         return true;
     case PlatformEvent::GestureScrollEnd:
     case PlatformEvent::GestureLongPress:
     case PlatformEvent::GestureFlingStart:
         m_scrollPos = 0;
         m_pressedPos = 0;
@@ skipping 184 matching lines @@
     if (!m_scrollableArea)
         return 0;
 
     if (m_orientation == HorizontalScrollbar)
         return m_scrollableArea->scrollPosition().x() - m_scrollableArea->minimumScrollPosition().x();
 
     return m_scrollableArea->scrollPosition().y() - m_scrollableArea->minimumScrollPosition().y();
 }
 
 } // namespace blink