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

Source/core/layout/line/InlineFlowBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 25 matching lines @@
 class VerticalPositionCache;
 
 struct GlyphOverflow;
 
 typedef HashMap<const InlineTextBox*, pair<Vector<const SimpleFontData*>, GlyphOverflow>> GlyphOverflowAndFallbackFontsMap;
 
 class InlineFlowBox : public InlineBox {
 public:
     InlineFlowBox(LayoutObject& obj)
         : InlineBox(obj)
-        , m_firstChild(0)
-        , m_lastChild(0)
-        , m_prevLineBox(0)
-        , m_nextLineBox(0)
+        , m_firstChild(nullptr)
+        , m_lastChild(nullptr)
+        , m_prevLineBox(nullptr)
+        , m_nextLineBox(nullptr)
         , m_includeLogicalLeftEdge(false)
         , m_includeLogicalRightEdge(false)
         , m_descendantsHaveSameLineHeightAndBaseline(true)
         , m_baselineType(AlphabeticBaseline)
         , m_hasAnnotationsBefore(false)
         , m_hasAnnotationsAfter(false)
         , m_lineBreakBidiStatusEor(WTF::Unicode::LeftToRight)
         , m_lineBreakBidiStatusLastStrong(WTF::Unicode::LeftToRight)
         , m_lineBreakBidiStatusLast(WTF::Unicode::LeftToRight)
         , m_isFirstAfterPageBreak(false)
 #if ENABLE(ASSERT)
         , m_hasBadChildList(false)
 #endif
     {
         // Internet Explorer and Firefox always create a marker for list items, even when the list-style-type is none.  We do not make a marker
         // in the list-style-type: none case, since it is wasteful to do so.  However, in order to match other browsers we have to pretend like
         // an invisible marker exists.  The side effect of having an invisible marker is that the quirks mode behavior of shrinking lines with no
         // text children must not apply.  This change also means that gaps will exist between image bullet list items.  Even when the list bullet
         // is an image, the line is still considered to be immune from the quirk.
         m_hasTextChildren = obj.style()->display() == LIST_ITEM;
         m_hasTextDescendants = m_hasTextChildren;
     }
 
 #if ENABLE(ASSERT)
     virtual ~InlineFlowBox();
 #endif
 
 #ifndef NDEBUG
-    virtual void showLineTreeAndMark(const InlineBox* = 0, const char* = 0, const InlineBox* = 0, const char* = 0, const LayoutObject* = 0, int = 0) const override;
+    virtual void showLineTreeAndMark(const InlineBox* = nullptr, const char* = nullptr, const InlineBox* = nullptr, const char* = nullptr, const LayoutObject* = nullptr, int = 0) const override;
 #endif
     virtual const char* boxName() const override;
 
     InlineFlowBox* prevLineBox() const { return m_prevLineBox; }
     InlineFlowBox* nextLineBox() const { return m_nextLineBox; }
     void setNextLineBox(InlineFlowBox* n) { m_nextLineBox = n; }
     void setPreviousLineBox(InlineFlowBox* p) { m_prevLineBox = p; }
 
     InlineBox* firstChild() const { checkConsistency(); return m_firstChild; }
     InlineBox* lastChild() const { checkConsistency(); return m_lastChild; }
 
     virtual bool isLeaf() const override final { return false; }
 
     InlineBox* firstLeafChild() const;
     InlineBox* lastLeafChild() const;
 
     typedef void (*CustomInlineBoxRangeReverse)(void* userData, Vector<InlineBox*>::iterator first, Vector<InlineBox*>::iterator last);
-    void collectLeafBoxesInLogicalOrder(Vector<InlineBox*>&, CustomInlineBoxRangeReverse customReverseImplementation = 0, void* userData = 0) const;
+    void collectLeafBoxesInLogicalOrder(Vector<InlineBox*>&, CustomInlineBoxRangeReverse customReverseImplementation = 0, void* userData = nullptr) const;
 
     virtual void setConstructed() override final
     {
         InlineBox::setConstructed();
         for (InlineBox* child = firstChild(); child; child = child->nextOnLine())
             child->setConstructed();
     }
 
     void addToLine(InlineBox* child);
     virtual void deleteLine() override final;
@@ skipping 257 matching lines @@
 }
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineFlowBox*);
 #endif
 
 #endif // InlineFlowBox_h