C++11: Replace 0 with nullptr where applicable in layout code.

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 39 matching lines @@
 
 LayoutView::LayoutView(Document* document)
     : LayoutBlockFlow(document)
     , m_frameView(document->view())
     , m_selectionStart(nullptr)
     , m_selectionEnd(nullptr)
     , m_selectionStartPos(-1)
     , m_selectionEndPos(-1)
     , m_pageLogicalHeight(0)
     , m_pageLogicalHeightChanged(false)
-    , m_layoutState(0)
+    , m_layoutState(nullptr)
     , m_layoutQuoteHead(nullptr)
     , m_layoutCounterCount(0)
     , m_hitTestCount(0)
     , m_pendingSelection(PendingSelection::create())
 {
     // init LayoutObject attributes
     setInline(false);
 
     m_minPreferredLogicalWidth = 0;
     m_maxPreferredLogicalWidth = 0;
@@ skipping 228 matching lines @@
             parentDocLayoutObject->mapLocalToContainer(paintInvalidationContainer, transformState, mode, wasFixed, paintInvalidationState);
             return;
         }
     }
 }
 
 const LayoutObject* LayoutView::pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap& geometryMap) const
 {
     LayoutSize offsetForFixedPosition;
     LayoutSize offset;
-    LayoutObject* container = 0;
+    LayoutObject* container = nullptr;
 
     if (m_frameView) {
         offsetForFixedPosition = LayoutSize(toIntSize(m_frameView->scrollPosition()));
         if (hasOverflowClip())
             offsetForFixedPosition = LayoutSize(scrolledContentOffset());
     }
 
     if (geometryMap.mapCoordinatesFlags() & TraverseDocumentBoundaries) {
         if (LayoutPart* parentDocLayoutObject = frame()->ownerLayoutObject()) {
             offset = -LayoutSize(m_frameView->scrollOffset());
@@ skipping 165 matching lines @@
 void LayoutView::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
 {
     if (wasFixed)
         *wasFixed = false;
     quads.append(FloatRect(FloatPoint(), layer()->size()));
 }
 
 static LayoutObject* layoutObjectAfterPosition(LayoutObject* object, unsigned offset)
 {
     if (!object)
-        return 0;
+        return nullptr;
 
     LayoutObject* child = object->childAt(offset);
     return child ? child : object->nextInPreOrderAfterChildren();
 }
 
 static LayoutRect selectionRectForLayoutObject(const LayoutObject* object)
 {
     if (!object->isRooted())
         return LayoutRect();
 
@@ skipping 342 matching lines @@
         return backgroundLayoutObject->style()->hasEntirelyFixedBackground();
     return false;
 }
 
 LayoutObject* LayoutView::backgroundLayoutObject() const
 {
     if (Element* documentElement = document().documentElement()) {
         if (LayoutObject* rootObject = documentElement->layoutObject())
             return rootObject->layoutObjectForRootBackground();
     }
-    return 0;
+    return nullptr;
 }
 
 LayoutRect LayoutView::backgroundRect(LayoutBox* backgroundLayoutObject) const
 {
     return LayoutRect(unscaledDocumentRect());
 }
 
 IntRect LayoutView::documentRect() const
 {
     FloatRect overflowRect(unscaledDocumentRect());
@@ skipping 105 matching lines @@
     return viewHeight(IncludeScrollbars) / scale;
 }
 
 void LayoutView::willBeDestroyed()
 {
     LayoutBlockFlow::willBeDestroyed();
     m_compositor.clear();
 }
 
 } // namespace blink