Remove Ununsed Input Variable from ScrollAnimator NotifyPosChange

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 35 matching lines @@
     , m_currentPosY(0)
 {
 }
 
 ScrollAnimator::~ScrollAnimator()
 {
 }
 
 bool ScrollAnimator::scroll(ScrollbarOrientation orientation, ScrollGranularity, float step, float delta)
 {
-    float* currentPos = (orientation == HorizontalScrollbar) ? &m_currentPosX : &m_currentPosY;
-    float newPos = clampScrollPosition(orientation, *currentPos + step * delta);
-    float scrolledDelta = *currentPos - newPos;
-    if (*currentPos == newPos)
+    float& currentPos = (orientation == HorizontalScrollbar) ? m_currentPosX : m_currentPosY;
+    float newPos = clampScrollPosition(orientation, currentPos + step * delta);
+    if (currentPos == newPos)
         return false;
-    *currentPos = newPos;
+    currentPos = newPos;
 
-    notifyPositionChanged(
-        orientation == HorizontalScrollbar ? FloatSize(scrolledDelta, 0) : FloatSize(0, scrolledDelta));
+    notifyPositionChanged();
 
     return true;
 }
 
 void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
 {
-    FloatSize delta = FloatSize(offset.x() - m_currentPosX, offset.y() - m_currentPosY);
     m_currentPosX = offset.x();
     m_currentPosY = offset.y();
-    notifyPositionChanged(delta);
+    notifyPositionChanged();
 }
 
 bool ScrollAnimator::handleWheelEvent(const PlatformWheelEvent& e)
 {
     bool canScrollX = m_scrollableArea->userInputScrollable(HorizontalScrollbar);
     bool canScrollY = m_scrollableArea->userInputScrollable(VerticalScrollbar);
 
     // Accept the event if we are scrollable in that direction and can still
     // scroll any further.
     float deltaX = canScrollX ? e.deltaX() : 0;
@@ skipping 44 matching lines @@
 {
     m_currentPosX = position.x();
     m_currentPosY = position.y();
 }
 
 FloatPoint ScrollAnimator::currentPosition() const
 {
     return FloatPoint(m_currentPosX, m_currentPosY);
 }
 
-void ScrollAnimator::notifyPositionChanged(const FloatSize&)
+void ScrollAnimator::notifyPositionChanged()
 {
     m_scrollableArea->setScrollOffsetFromAnimation(IntPoint(m_currentPosX, m_currentPosY));
 }
 
 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 WebCore