Factor painting code out of RenderBox into a new class called BoxPainter.

Source/core/rendering/RenderFieldset.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "config.h"
 #include "core/rendering/RenderFieldset.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/HTMLNames.h"
 #include "core/html/HTMLLegendElement.h"
+#include "core/paint/BoxDecorationData.h"
+#include "core/paint/BoxPainter.h"
 #include "core/rendering/PaintInfo.h"
 #include "platform/graphics/GraphicsContextStateSaver.h"
 
 using std::min;
 using std::max;
 
 namespace blink {
 
 using namespace HTMLNames;
 
@@ skipping 112 matching lines @@
     if (style()->isHorizontalWritingMode()) {
         LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - borderTop()) / 2;
         paintRect.setHeight(paintRect.height() - yOff);
         paintRect.setY(paintRect.y() + yOff);
     } else {
         LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - borderLeft()) / 2;
         paintRect.setWidth(paintRect.width() - xOff);
         paintRect.setX(paintRect.x() + xOff);
     }
 
-    BoxDecorationData boxDecorationData(*style());
+    BoxDecorationData boxDecorationData(*style(), canRenderBorderImage(), backgroundHasOpaqueTopLayer(), paintInfo.context);
 
-    if (!boxShadowShouldBeAppliedToBackground(determineBackgroundBleedAvoidance(paintInfo.context, boxDecorationData)))
+    if (boxDecorationData.bleedAvoidance() == BackgroundBleedNone)
         paintBoxShadow(paintInfo, paintRect, style(), Normal);
-    paintFillLayers(paintInfo, boxDecorationData.backgroundColor, style()->backgroundLayers(), paintRect);
+    BoxPainter(*this).paintFillLayers(paintInfo, boxDecorationData.backgroundColor, style()->backgroundLayers(), paintRect);
     paintBoxShadow(paintInfo, paintRect, style(), Inset);
 
     if (!boxDecorationData.hasBorder)
         return;
 
     // Create a clipping region around the legend and paint the border as normal
     GraphicsContext* graphicsContext = paintInfo.context;
     GraphicsContextStateSaver stateSaver(*graphicsContext);
 
     // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
@@ skipping 28 matching lines @@
     if (style()->isHorizontalWritingMode()) {
         LayoutUnit yOff = (legend->y() > 0) ? LayoutUnit() : (legend->height() - borderTop()) / 2;
         paintRect.expand(0, -yOff);
         paintRect.move(0, yOff);
     } else {
         LayoutUnit xOff = (legend->x() > 0) ? LayoutUnit() : (legend->width() - borderLeft()) / 2;
         paintRect.expand(-xOff, 0);
         paintRect.move(xOff, 0);
     }
 
-    paintMaskImages(paintInfo, paintRect);
+    BoxPainter(*this).paintMaskImages(paintInfo, paintRect);
 }
 
 } // namespace blink