Expose fractional TouchEvent coordinates

Source/platform/scroll/ScrollView.h

 /*
  * Copyright (C) 2004, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Holger Hans Peter Freyther
  *
  * 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
@@ skipping 161 matching lines @@
 
     IntPoint rootViewToContents(const IntPoint&) const;
     IntPoint contentsToRootView(const IntPoint&) const;
     IntRect rootViewToContents(const IntRect&) const;
     IntRect contentsToRootView(const IntRect&) const;
 
     // Event coordinates are assumed to be in the coordinate space of a window that contains
     // the entire widget hierarchy. It is up to the platform to decide what the precise definition
     // of containing window is. (For example on Mac it is the containing NSWindow.)
     IntPoint windowToContents(const IntPoint&) const;
+    FloatPoint windowToContents(const FloatPoint&) const;
     IntPoint contentsToWindow(const IntPoint&) const;
     IntRect windowToContents(const IntRect&) const;
     IntRect contentsToWindow(const IntRect&) const;
 
     // Functions for converting to screen coordinates.
     IntRect contentsToScreen(const IntRect&) const;
 
     // These functions are used to enable scrollbars to avoid window resizer controls that overlap the scroll view. This happens on Mac
     // for example.
     virtual IntRect windowResizerRect() const { return IntRect(); }
@@ skipping 129 matching lines @@
 
     void calculateOverhangAreasForPainting(IntRect& horizontalOverhangRect, IntRect& verticalOverhangRect);
     void updateOverhangAreas();
 }; // class ScrollView
 
 DEFINE_TYPE_CASTS(ScrollView, Widget, widget, widget->isScrollView(), widget.isScrollView());
 
 } // namespace WebCore
 
 #endif // ScrollView_h