Convert LayoutState/LayoutStateMaintainer/LayoutStateDisabler to references

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 948 matching lines @@
     if (renderer()->isOutOfFlowPositioned() && enclosingPositionedAncestor()) {
         RenderLayer* positionedParent = enclosingPositionedAncestor();
 
         // For positioned layers, we subtract out the enclosing positioned layer's scroll offset.
         if (positionedParent->renderer()->hasOverflowClip()) {
             LayoutSize offset = positionedParent->renderBox()->scrolledContentOffset();
             localPoint -= offset;
         }
 
         if (renderer()->isOutOfFlowPositioned() && positionedParent->renderer()->isInFlowPositioned() && positionedParent->renderer()->isRenderInline()) {
-            LayoutSize offset = toRenderInline(positionedParent->renderer())->offsetForInFlowPositionedInline(toRenderBox(renderer()));
+            LayoutSize offset = toRenderInline(positionedParent->renderer())->offsetForInFlowPositionedInline(*toRenderBox(renderer()));
             localPoint += offset;
         }
     } else if (parent()) {
         if (hasCompositedLayerMapping()) {
             // FIXME: Composited layers ignore pagination, so about the best we can do is make sure they're offset into the appropriate column.
             // They won't split across columns properly.
             LayoutSize columnOffset;
             if (!parent()->renderer()->hasColumns() && parent()->renderer()->isRoot() && renderer()->view()->hasColumns())
                 renderer()->view()->adjustForColumns(columnOffset, localPoint);
             else
@@ skipping 3040 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif