Use reference for FillLayer if possible

Source/core/rendering/RenderTableCell.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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
@@ skipping 1154 matching lines @@
 
     RenderTable* tableElt = table();
     if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild())
         return;
 
     LayoutPoint adjustedPaintOffset = paintOffset;
     if (backgroundObject != this)
         adjustedPaintOffset.moveBy(location());
 
     Color c = backgroundObject->resolveColor(CSSPropertyBackgroundColor);
-    const FillLayer* bgLayer = backgroundObject->style()->backgroundLayers();
+    const FillLayer& bgLayer = backgroundObject->style()->backgroundLayers();
 
-    if (bgLayer->hasImage() || c.alpha()) {
+    if (bgLayer.hasImage() || c.alpha()) {
         // We have to clip here because the background would paint
         // on top of the borders otherwise.  This only matters for cells and rows.
         bool shouldClip = backgroundObject->hasLayer() && (backgroundObject == this || backgroundObject == parent()) && tableElt->collapseBorders();
         GraphicsContextStateSaver stateSaver(*paintInfo.context, shouldClip);
         if (shouldClip) {
             LayoutRect clipRect(adjustedPaintOffset.x() + borderLeft(), adjustedPaintOffset.y() + borderTop(),
                 width() - borderLeft() - borderRight(), height() - borderTop() - borderBottom());
             paintInfo.context->clip(clipRect);
         }
         paintFillLayers(paintInfo, c, bgLayer, LayoutRect(adjustedPaintOffset, pixelSnappedSize()), BackgroundBleedNone, CompositeSourceOver, backgroundObject);
@@ skipping 73 matching lines @@
 
 RenderTableCell* RenderTableCell::createAnonymousWithParentRenderer(const RenderObject* parent)
 {
     RenderTableCell* newCell = RenderTableCell::createAnonymous(&parent->document());
     RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parent->style(), TABLE_CELL);
     newCell->setStyle(newStyle.release());
     return newCell;
 }
 
 } // namespace WebCore