Convert first letter into a pseudo element.

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index abd57909e938ef9cf8e015018160cef28e2a621d..d987f6198b1cb95e11c23234aa0676184abbc267 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -621,8 +621,8 @@ public:
     void clearNode() { m_node = nullptr; }
 
     // Returns the styled node that caused the generation of this renderer.
-    // This is the same as node() except for renderers of :before and :after
-    // pseudo elements for which their parent node is returned.
+    // This is the same as node() except for renderers of :before, :after and
+    // :first-letter pseudo elements for which their parent node is returned.
     Node* generatingNode() const { return isPseudoElement() ? node()->parentOrShadowHostNode() : node(); }
 
     Document& document() const { return m_node->document(); }