Break LayoutObject dependency for NinePieceImagePainter

third_party/WebKit/Source/core/paint/FieldsetPainter.cpp

Index: third_party/WebKit/Source/core/paint/FieldsetPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/FieldsetPainter.cpp b/third_party/WebKit/Source/core/paint/FieldsetPainter.cpp
index e516a87a5cdcc0ab50cb3daff4e1d4bf7e888b69..35d8a64d2aeab7f9b0db99d622653ff9824b9d94 100644
--- a/third_party/WebKit/Source/core/paint/FieldsetPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/FieldsetPainter.cpp
@@ -87,7 +87,12 @@ void FieldsetPainter::PaintBoxDecorationBackground(
                             clip_width, legend->Size().Height()));
   }
 
-  BoxPainter::PaintBorder(layout_fieldset_, paint_info, paint_rect,
+  Node* node = nullptr;
+  const LayoutObject* layout_object = &layout_fieldset_;
+  for (; layout_object && !node; layout_object = layout_object->Parent())
+    node = layout_object->GeneratingNode();
+  BoxPainter::PaintBorder(layout_fieldset_, layout_fieldset_.GetDocument(),
+                          node, paint_info, paint_rect,
                           layout_fieldset_.StyleRef());
 }