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

Source/core/dom/TreeScope.h

Index: Source/core/dom/TreeScope.h
diff --git a/Source/core/dom/TreeScope.h b/Source/core/dom/TreeScope.h
index ecfc83079153ac23adc2e34bd0d4fb181566d48f..f28c70fdb9a68312bd5c810a5df67cf42950ad5b 100644
--- a/Source/core/dom/TreeScope.h
+++ b/Source/core/dom/TreeScope.h
@@ -42,6 +42,7 @@ 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
@@ -186,7 +187,7 @@ inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) co
     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