Calculate correct clip foregroundBound and backgroundBound

Source/core/paint/DeprecatedPaintLayerPainter.cpp

Index: Source/core/paint/DeprecatedPaintLayerPainter.cpp
diff --git a/Source/core/paint/DeprecatedPaintLayerPainter.cpp b/Source/core/paint/DeprecatedPaintLayerPainter.cpp
index dd5c832349eff691dbe899aefe94b446eea0190b..ff68a6569e007625417b216d1ce1063b0fc21c9d 100644
--- a/Source/core/paint/DeprecatedPaintLayerPainter.cpp
+++ b/Source/core/paint/DeprecatedPaintLayerPainter.cpp
@@ -228,6 +228,8 @@ void DeprecatedPaintLayerPainter::paintLayerContents(GraphicsContext* context, c
     }
 
     DeprecatedPaintLayerPaintingInfo localPaintingInfo(paintingInfo);
+    if (m_paintLayer.compositingState() == PaintsIntoOwnBacking)
+        localPaintingInfo.subPixelAccumulation = m_paintLayer.subpixelAccumulation();
 
     DeprecatedPaintLayerFragments layerFragments;
     if (shouldPaintContent || shouldPaintOutline || isPaintingOverlayScrollbars) {