Create a watchlist entry for Source/core/paint.

Source/core/paint/BoxPainter.cpp

Index: Source/core/paint/BoxPainter.cpp
diff --git a/Source/core/paint/BoxPainter.cpp b/Source/core/paint/BoxPainter.cpp
index 2a9a2b6bfb27d10f04fcfec381748385601f1d87..47aab28f85e25ca221d401b591dea19c9230d99c 100644
--- a/Source/core/paint/BoxPainter.cpp
+++ b/Source/core/paint/BoxPainter.cpp
@@ -106,6 +106,8 @@ static bool skipBodyBackground(const RenderBox* bodyElementRenderer)
 
 void BoxPainter::paintBackground(const PaintInfo& paintInfo, const LayoutRect& paintRect, const Color& backgroundColor, BackgroundBleedAvoidance bleedAvoidance)
 {
+    // fprintf(stderr, "paintBackground for ");
+    // m_renderBox.showRenderTreeForThis();
     if (m_renderBox.isDocumentElement()) {
         paintRootBoxFillLayers(paintInfo);
         return;