Make Document::caretRangeFromPoint() to work with :first-letter style

Source/core/dom/TreeScope.h

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 24 matching lines @@
 
 class ContainerNode;
 class DOMSelection;
 class Document;
 class Element;
 class HTMLLabelElement;
 class HTMLMapElement;
 class LayoutPoint;
 class IdTargetObserverRegistry;
 class Node;
+class RenderObject;
 
 // A class which inherits both Node and TreeScope must call clearRareData() in its destructor
 // so that the Node destructor no longer does problematic NodeList cache manipulation in
 // the destructor.
 class TreeScope {
     friend class Document;
     friend class TreeScopeAdopter;
 
 public:
     TreeScope* parentTreeScope() const { return m_parentTreeScope; }
@@ skipping 124 matching lines @@
 {
     ASSERT(id);
     return m_elementsById && m_elementsById->contains(id);
 }
 
 inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) const
 {
     return m_elementsById && m_elementsById->containsMultiple(id.impl());
 }
 
-Node* nodeFromPoint(Document*, int x, int y, LayoutPoint* localPoint = 0);
+RenderObject* rendererFromPoint(Document*, int x, int y, LayoutPoint* localPoint = 0);
 TreeScope* commonTreeScope(Node*, Node*);
 
 } // namespace WebCore
 
 #endif // TreeScope_h