Replace various ScrollableArea scroll methods with setScrollPosition

Source/platform/scroll/ScrollAnimator.cpp

 /*
  * Copyright (c) 2010, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
 ScrollResultOneDimensional ScrollAnimator::userScroll(ScrollbarOrientation orientation, ScrollGranularity, float step, float delta)
 {
     float& currentPos = (orientation == HorizontalScrollbar) ? m_currentPosX : m_currentPosY;
     float newPos = clampScrollPosition(orientation, currentPos + step * delta);
     if (currentPos == newPos)
         return ScrollResultOneDimensional(false, delta);
 
     float usedDelta = (newPos - currentPos) / step;
     currentPos = newPos;
 
-    notifyPositionChanged();
+    notifyPositionChanged(UserScroll);
 
     return ScrollResultOneDimensional(true, delta - usedDelta);
 }
 
-void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
+void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollType scrollType)
 {
     m_currentPosX = offset.x();
     m_currentPosY = offset.y();
-    notifyPositionChanged();
+    notifyPositionChanged(scrollType);
 }
 
 ScrollResult ScrollAnimator::handleWheelEvent(const PlatformWheelEvent& e)
 {
     bool canScrollX = m_scrollableArea->userInputScrollable(HorizontalScrollbar)
         && e.railsMode() != PlatformEvent::RailsModeVertical;
     bool canScrollY = m_scrollableArea->userInputScrollable(VerticalScrollbar)
         && e.railsMode() != PlatformEvent::RailsModeHorizontal;
 
     // Accept the event if we are scrollable in that direction and can still
@@ skipping 64 matching lines @@
 {
     m_currentPosX = position.x();
     m_currentPosY = position.y();
 }
 
 FloatPoint ScrollAnimator::currentPosition() const
 {
     return FloatPoint(m_currentPosX, m_currentPosY);
 }
 
-void ScrollAnimator::notifyPositionChanged()
+void ScrollAnimator::notifyPositionChanged(ScrollType scrollType)
 {
     if (!m_scrollableArea->shouldUseIntegerScrollOffset())
-        m_scrollableArea->setScrollOffsetFromAnimation(DoublePoint(m_currentPosX, m_currentPosY));
+        m_scrollableArea->setScrollOffsetFromAnimation(DoublePoint(m_currentPosX, m_currentPosY), scrollType);
     else
-        m_scrollableArea->setScrollOffsetFromAnimation(IntPoint(m_currentPosX, m_currentPosY));
+        m_scrollableArea->setScrollOffsetFromAnimation(IntPoint(m_currentPosX, m_currentPosY), scrollType);
 }
 
 float ScrollAnimator::clampScrollPosition(ScrollbarOrientation orientation, float pos)
 {
     float maxScrollPos = m_scrollableArea->maximumScrollPosition(orientation);
     float minScrollPos = m_scrollableArea->minimumScrollPosition(orientation);
     return std::max(std::min(pos, maxScrollPos), minScrollPos);
 }
 
 } // namespace blink