[Layout API] Use ownerLayoutItem() in LayoutView (part 2)

third_party/WebKit/Source/core/layout/LayoutView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 303 matching lines @@
         if (hasOverflowClip())
             transformState.move(scrolledContentOffset());
         // IsFixed flag is only applicable within this LayoutView.
         mode &= ~IsFixed;
     }
 
     if (ancestor == this)
         return;
 
     if (mode & TraverseDocumentBoundaries) {
-        if (LayoutPart* parentDocLayoutObject = frame()->ownerLayoutObject()) {
+        LayoutPartItem parentDocLayoutItem = frame()->ownerLayoutItem();
+        if (!parentDocLayoutItem.isNull()) {
             if (!(mode & InputIsInFrameCoordinates)) {
                 transformState.move(-frame()->view()->scrollOffset());
             } else {
                 // The flag applies to immediate LayoutView only.
                 mode &= ~InputIsInFrameCoordinates;
             }
 
-            transformState.move(parentDocLayoutObject->contentBoxOffset());
+            transformState.move(parentDocLayoutItem.contentBoxOffset());
 
-            parentDocLayoutObject->mapLocalToAncestor(ancestor, transformState, mode);
+            parentDocLayoutItem.mapLocalToAncestor(ancestor, transformState, mode);
         }
     }
 }
 
 const LayoutObject* LayoutView::pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap& geometryMap) const
 {
     LayoutSize offsetForFixedPosition;
     LayoutSize offset;
     LayoutObject* container = nullptr;
 
@@ skipping 643 matching lines @@
     // of this override. All frame scrolling should be handled by
     // ViewportScrollCallback.
 
     if (!frameView())
         return ScrollResult(false, false, delta.width(), delta.height());
 
     return frameView()->getScrollableArea()->userScroll(granularity, delta);
 }
 
 } // namespace blink