Make first-letter style to work with editing

Source/core/dom/Position.h

Index: Source/core/dom/Position.h
diff --git a/Source/core/dom/Position.h b/Source/core/dom/Position.h
index 7a306942eb6cc74c75241958ded644c64bbc1d26..6c7e3a2ed22d0f8ba7ba9d6cf974657a8943344f 100644
--- a/Source/core/dom/Position.h
+++ b/Source/core/dom/Position.h
@@ -122,6 +122,9 @@ public:
 
     Node* anchorNode() const { return m_anchorNode.get(); }
 
+    RenderObject* renderer() const;
+    int offsetInRenderer() const;
+
     // FIXME: Callers should be moved off of node(), node() is not always the container for this position.
     // For nodes which editingIgnoresContent(node()) returns true, positions like [ignoredNode, 0]
     // will be treated as before ignoredNode (thus node() is really after the position, not containing it).
@@ -189,6 +192,7 @@ public:
 
     static bool hasRenderedNonAnonymousDescendantsWithHeight(RenderObject*);
     static bool nodeIsUserSelectNone(Node*);
+    static bool rendererIsUserSelectNone(RenderObject*);
 #if ENABLE(USERSELECT_ALL)
     static bool nodeIsUserSelectAll(const Node*);
     static Node* rootUserSelectAllForNode(Node*);