Update renderer to layoutObject in core/html.

Source/core/html/HTMLOptGroupElement.h

Index: Source/core/html/HTMLOptGroupElement.h
diff --git a/Source/core/html/HTMLOptGroupElement.h b/Source/core/html/HTMLOptGroupElement.h
index f01472e7c1a57f3b0915b03fcc186544fcea22a1..6de272350dc4eee9458e734f6287261297e20dd4 100644
--- a/Source/core/html/HTMLOptGroupElement.h
+++ b/Source/core/html/HTMLOptGroupElement.h
@@ -55,7 +55,7 @@ private:
     virtual void attach(const AttachContext& = AttachContext()) override;
     virtual void detach(const AttachContext& = AttachContext()) override;
 
-    // <optgroup> might not have a renderer so we manually manage a cached style.
+    // <optgroup> might not have a layoutObject so we manually manage a cached style.
     void updateNonComputedStyle();
     virtual ComputedStyle* nonLayoutObjectComputedStyle() const override;
     virtual PassRefPtr<ComputedStyle> customStyleForLayoutObject() override;