Make first-letter style to work with editing

Source/core/dom/PositionIterator.h

Index: Source/core/dom/PositionIterator.h
diff --git a/Source/core/dom/PositionIterator.h b/Source/core/dom/PositionIterator.h
index 6587f7eb0a54ebe3dc5da5b4352aaf6f093d0242..bde811a749d8ae33735959cedba440058eb1ea12 100644
--- a/Source/core/dom/PositionIterator.h
+++ b/Source/core/dom/PositionIterator.h
@@ -31,6 +31,8 @@
 
 namespace WebCore {
 
+class RenderObject;
+
 // A Position iterator with constant-time
 // increment, decrement, and several predicates on the Position it is at.
 // Conversion to/from Position is O(n) in the offset.
@@ -56,6 +58,7 @@ public:
 
     Node* node() const { return m_anchorNode; }
     int offsetInLeafNode() const { return m_offsetInAnchor; }
+    RenderObject* renderer() const;
 
     bool atStart() const;
     bool atEnd() const;