Expose fractional TouchEvent coordinates

Source/platform/scroll/ScrollView.cpp

 /*
  * Copyright (C) 2006, 2007, 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 583 matching lines @@
     viewRect.move(-scrollOffset());
     return convertToRootView(viewRect);
 }
 
 IntPoint ScrollView::windowToContents(const IntPoint& windowPoint) const
 {
     IntPoint viewPoint = convertFromContainingWindow(windowPoint);
     return viewPoint + scrollOffset();
 }
 
+FloatPoint ScrollView::windowToContents(const FloatPoint& windowPoint) const
+{
+    FloatPoint viewPoint = convertFromContainingWindow(windowPoint);
+    return viewPoint + scrollOffset();
+}
+
 IntPoint ScrollView::contentsToWindow(const IntPoint& contentsPoint) const
 {
     IntPoint viewPoint = contentsPoint - scrollOffset();
     return convertToContainingWindow(viewPoint);
 }
 
 IntRect ScrollView::windowToContents(const IntRect& windowRect) const
 {
     IntRect viewRect = convertFromContainingWindow(windowRect);
     viewRect.move(scrollOffset());
@@ skipping 500 matching lines @@
         return;
 
     ScrollableArea::setScrollOrigin(origin);
 
     // Update if the scroll origin changes, since our position will be different if the content size did not change.
     if (updatePositionAtAll && updatePositionSynchronously)
         updateScrollbars(scrollOffset());
 }
 
 } // namespace WebCore