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

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 53e79c06fe0a0e310bbf7f5528e29adaa75c9ef2..0b80edfff5ad3f9dae571baf96c374ecec47952c 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -154,7 +154,6 @@ class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
 class ScriptedIdleTaskController;
-class Scrollbar;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
@@ -714,7 +713,7 @@ class CORE_EXPORT Document : public ContainerNode,
   void hoveredNodeDetached(Element&);
   void activeChainNodeDetached(Element&);
 
-  void updateHoverActiveState(const HitTestRequest&, Element*, Scrollbar*);
+  void updateHoverActiveState(const HitTestRequest&, Element*);
 
   // Updates for :target (CSS3 selector).
   void setCSSTarget(Element*);