Should paint border before background when bleedAvoidance is BackgroundBleedBackgroundOverBorder

Source/core/rendering/RenderBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * 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.
  *
@@ skipping 137 matching lines @@
     void move(LayoutUnit dx, LayoutUnit dy) { m_frameRect.move(dx, dy); }
 
     LayoutRect frameRect() const { return m_frameRect; }
     IntRect pixelSnappedFrameRect() const { return pixelSnappedIntRect(m_frameRect); }
     void setFrameRect(const LayoutRect& rect) { m_frameRect = rect; }
 
     LayoutRect borderBoxRect() const { return LayoutRect(LayoutPoint(), size()); }
     LayoutRect paddingBoxRect() const { return LayoutRect(borderLeft(), borderTop(), contentWidth() + paddingLeft() + paddingRight(), contentHeight() + paddingTop() + paddingBottom()); }
     IntRect pixelSnappedBorderBoxRect() const { return IntRect(IntPoint(), m_frameRect.pixelSnappedSize()); }
     virtual IntRect borderBoundingBox() const OVERRIDE FINAL { return pixelSnappedBorderBoxRect(); }
+    virtual bool collapseBorders() const { return false; }
 
     // The content area of the box (excludes padding - and intrinsic padding for table cells, etc... - and border).
     LayoutRect contentBoxRect() const { return LayoutRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), contentWidth(), contentHeight()); }
     // The content box in absolute coords. Ignores transforms.
     IntRect absoluteContentBox() const;
     // The content box converted to absolute coords (taking transforms into account).
     FloatQuad absoluteContentQuad() const;
 
     // This returns the content area of the box (excluding padding and border). The only difference with contentBoxRect is that computedCSSContentBoxRect
     // does include the intrinsic padding in the content box as this is what some callers expect (like getComputedStyle).
@@ skipping 587 matching lines @@
         if (UNLIKELY(m_inlineBoxWrapper != 0))
             deleteLineBoxWrapper();
     }
 
     m_inlineBoxWrapper = boxWrapper;
 }
 
 } // namespace WebCore
 
 #endif // RenderBox_h