Rework compositor touch hit testing

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1082 matching lines @@
     void setCompositingReasons(CompositingReasons reasons) { m_compositingProperties.compositingReasons = reasons; }
     CompositingReasons compositingReasons() const { return m_compositingProperties.compositingReasons; }
 
     // Returns true if z ordering would not change if this layer were a stacking container.
     bool canBeStackingContainer() const;
 
     friend class RenderLayerBacking;
     friend class RenderLayerCompositor;
     friend class RenderLayerModelObject;
 
-    // Only safe to call from RenderBoxModelObject::destroyLayer(RenderArena*)
+    // Only safe to call from RenderLayerModelObject::destroyLayer(RenderArena*)
     void destroy(RenderArena*);
 
     LayoutUnit overflowTop() const;
     LayoutUnit overflowBottom() const;
     LayoutUnit overflowLeft() const;
     LayoutUnit overflowRight() const;
 
     IntRect rectForHorizontalScrollbar(const IntRect& borderBoxRect) const;
     IntRect rectForVerticalScrollbar(const IntRect& borderBoxRect) const;
 
@@ skipping 207 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const WebCore::RenderLayer*);
 void showLayerTree(const WebCore::RenderObject*);
 #endif
 
 #endif // RenderLayer_h