Remove some dead code.

sky/engine/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)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 326 matching lines @@
     void setActiveHoverElement(PassRefPtr<Element>);
     Element* activeHoverElement() const { return m_activeHoverElement.get(); }
 
     void removeFocusedElementOfSubtree(Node*, bool amongChildrenOnly = false);
     void hoveredNodeDetached(Node*);
     void activeChainNodeDetached(Node*);
 
     void updateHoverActiveState(const HitTestRequest&, Element*, const PlatformMouseEvent* = 0);
 
     void scheduleRenderTreeUpdateIfNeeded();
-    bool hasPendingForcedStyleRecalc() const;
 
     void attachRange(Range*);
     void detachRange(Range*);
 
     void updateRangesAfterChildrenChanged(ContainerNode*);
     void updateRangesAfterNodeMovedToAnotherDocument(const Node&);
     // nodeChildrenWillBeRemoved is used when removing all node children at once.
     void nodeChildrenWillBeRemoved(ContainerNode&);
     // nodeWillBeRemoved is only safe when removing one node at a time.
     void nodeWillBeRemoved(Node&);
@@ skipping 429 matching lines @@
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLiveDocumentInstances();
 #endif
 
 #endif  // SKY_ENGINE_CORE_DOM_DOCUMENT_H_