Change hittest node to be scrollbar's parent when hittest include a scrollbar

third_party/WebKit/Source/core/layout/HitTestResult.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 181 matching lines @@
   NodeSet& mutableListBasedTestResult();  // See above.
   HTMLMediaElement* mediaElement() const;
 
   HitTestLocation m_hitTestLocation;
   HitTestRequest m_hitTestRequest;
   bool m_cacheable;
 
   Member<Node> m_innerNode;
   Member<Node> m_innerPossiblyPseudoNode;
   // FIXME: Nothing changes this to a value different from m_hitTestLocation!
-  LayoutPoint m_pointInInnerNodeFrame;  // The hit-tested point in innerNode
-                                        // frame coordinates.
-  LayoutPoint m_localPoint;  // A point in the local coordinate space of
-                             // m_innerNode's layoutObject.Allows us to
-                             // efficiently determine where inside the
-                             // layoutObject we hit on subsequent operations.
+  // The hit-tested point in innerNode frame coordinates.
+  LayoutPoint m_pointInInnerNodeFrame;
+  // A point in the local coordinate space of m_innerNode's layoutObject.Allows
+  // us to efficiently determine where inside the layoutObject we hit on
+  // subsequent operations.
+  LayoutPoint m_localPoint;
+  // For non-URL, this is the enclosing that triggers navigation.
   Member<Element> m_innerURLElement;
   Member<Scrollbar> m_scrollbar;
-  bool m_isOverFrameViewBase;  // Returns true if we are over a FrameViewBase
-                               // (and not in the border/padding area of a
-                               // LayoutPart for example).
+  // Returns true if we are over a FrameViewBase (and not in the border/padding
+  // area of a LayoutPart for example).
+  bool m_isOverFrameViewBase;
 
   mutable Member<NodeSet> m_listBasedTestResult;
   String m_canvasRegionId;
 };
 
 }  // namespace blink
 
 WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(blink::HitTestResult);
 
 #endif  // HitTestResult_h