Reland of Fix link's hover state if the link under scrollbar

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 701 matching lines @@
 
   void setActiveHoverElement(Element*);
   Element* activeHoverElement() const { return m_activeHoverElement.get(); }
 
   Node* hoverNode() const { return m_hoverNode.get(); }
 
   void removeFocusedElementOfSubtree(Node*, bool amongChildrenOnly = false);
   void hoveredNodeDetached(Element&);
   void activeChainNodeDetached(Element&);
 
-  void updateHoverActiveState(const HitTestRequest&, Element*);
+  void updateHoverActiveState(const HitTestRequest&,
+                              Element*,
+                              bool hitScrollbar);
 
   // Updates for :target (CSS3 selector).
   void setCSSTarget(Element*);
   Element* cssTarget() const { return m_cssTarget; }
 
   void scheduleLayoutTreeUpdateIfNeeded();
   bool hasPendingForcedStyleRecalc() const;
 
   void registerNodeList(const LiveNodeListBase*);
   void unregisterNodeList(const LiveNodeListBase*);
@@ skipping 976 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif  // Document_h