Replace various ScrollableArea scroll methods with setScrollPosition

Source/platform/mac/ScrollAnimatorMac.mm

 /*
  * Copyright (C) 2010, 2011 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 708 matching lines @@
         newPoint = orientation == HorizontalScrollbar ? NSMakePoint(newPos, targetOrigin.y) : NSMakePoint(targetOrigin.x, newPos);
     } else
         newPoint = orientation == HorizontalScrollbar ? NSMakePoint(newPos, m_currentPosY) : NSMakePoint(m_currentPosX, newPos);
 
     [m_scrollAnimationHelper.get() scrollToPoint:newPoint];
 
     float usedDelta = (newPos - currentPos) / step;
     return ScrollResultOneDimensional(true, delta - usedDelta);
 }
 
-void ScrollAnimatorMac::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
+void ScrollAnimatorMac::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollType scrollType)
 {
     [m_scrollAnimationHelper.get() _stopRun];
-    immediateScrollTo(offset);
+    immediateScrollTo(offset, scrollType);
 }
 
 FloatPoint ScrollAnimatorMac::adjustScrollPositionIfNecessary(const FloatPoint& position) const
 {
     if (!m_scrollableArea->constrainsScrollingToContentEdge())
         return position;
 
     IntPoint minPos = m_scrollableArea->minimumScrollPosition();
     IntPoint maxPos = m_scrollableArea->maximumScrollPosition();
 
     float newX = std::max<float>(std::min<float>(position.x(), maxPos.x()), minPos.x());
     float newY = std::max<float>(std::min<float>(position.y(), maxPos.y()), minPos.y());
 
     return FloatPoint(newX, newY);
 }
 
-void ScrollAnimatorMac::immediateScrollTo(const FloatPoint& newPosition)
+void ScrollAnimatorMac::immediateScrollTo(const FloatPoint& newPosition, ScrollType scrollType)
 {
     FloatPoint adjustedPosition = adjustScrollPositionIfNecessary(newPosition);
 
     bool positionChanged = adjustedPosition.x() != m_currentPosX || adjustedPosition.y() != m_currentPosY;
     if (!positionChanged && !scrollableArea()->scrollOriginChanged())
         return;
 
     FloatSize delta = FloatSize(adjustedPosition.x() - m_currentPosX, adjustedPosition.y() - m_currentPosY);
 
     m_currentPosX = adjustedPosition.x();
     m_currentPosY = adjustedPosition.y();
     notifyContentAreaScrolled(delta);
-    notifyPositionChanged();
+    notifyPositionChanged(scrollType);
 }
 
 void ScrollAnimatorMac::contentAreaWillPaint() const
 {
     if (!scrollableArea()->scrollbarsCanBeActive())
         return;
     if (ScrollbarThemeMacCommon::isOverlayAPIAvailable())
         [m_scrollbarPainterController.get() contentAreaWillDraw];
 }
 
@@ skipping 381 matching lines @@
         return;
 
     m_visibleScrollerThumbRect = rectInViewCoordinates;
 }
 
 bool ScrollAnimatorMac::canUseCoordinatedScrollbar() {
     return ScrollbarThemeMacCommon::isOverlayAPIAvailable();
 }
 
 } // namespace blink