Change PaintLayer::m_layoutObject to a reference.

third_party/WebKit/Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
@@ skipping 199 matching lines @@
     // itself. This will also paint the contents behind the object if the
     // object contains transparency and there are other elements in the same
     // stacking context which stacked below.
     PaintLayer* layer = draggedLayoutObject->enclosingLayer();
     if (!layer->stackingNode()->isStackingContext())
       layer = layer->stackingNode()->ancestorStackingContextNode()->layer();
     IntRect absoluteBoundingBox =
         draggedLayoutObject->absoluteBoundingBoxRectIncludingDescendants();
     FloatRect boundingBox =
         layer->layoutObject()
-            ->absoluteToLocalQuad(FloatQuad(absoluteBoundingBox), UseTransforms)
+            .absoluteToLocalQuad(FloatQuad(absoluteBoundingBox), UseTransforms)
             .boundingBox();
     DragImageBuilder dragImageBuilder(*m_localFrame, boundingBox);
     {
       PaintLayerPaintingInfo paintingInfo(layer, LayoutRect(boundingBox),
                                           GlobalPaintFlattenCompositingLayers,
                                           LayoutSize());
       PaintLayerFlags flags = PaintLayerHaveTransparency |
                               PaintLayerAppliedTransform |
                               PaintLayerUncachedClipRects;
       PaintLayerPainter(*layer).paint(dragImageBuilder.context(), paintingInfo,
@@ skipping 686 matching lines @@
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Enter();
 }
 
 ScopedFrameBlamer::~ScopedFrameBlamer() {
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Leave();
 }
 
 }  // namespace blink