Get rid of NULLs in xfa/

xfa/fxfa/parser/xfa_layout_itemlayout.h

Index: xfa/fxfa/parser/xfa_layout_itemlayout.h
diff --git a/xfa/fxfa/parser/xfa_layout_itemlayout.h b/xfa/fxfa/parser/xfa_layout_itemlayout.h
index f7376d250e5c08e82376507497c025bb33bccf94..4085d4d286b12d3b23b18f741e39427632d78033 100644
--- a/xfa/fxfa/parser/xfa_layout_itemlayout.h
+++ b/xfa/fxfa/parser/xfa_layout_itemlayout.h
@@ -47,12 +47,12 @@ enum XFA_ItemLayoutProcessorStages {
 class CXFA_LayoutContext {
  public:
   CXFA_LayoutContext()
-      : m_prgSpecifiedColumnWidths(NULL),
+      : m_prgSpecifiedColumnWidths(nullptr),
         m_fCurColumnWidth(0),
         m_bCurColumnWidthAvaiable(FALSE),
-        m_pOverflowProcessor(NULL),
-        m_pOverflowNode(NULL) {}
-  ~CXFA_LayoutContext() { m_pOverflowProcessor = NULL; }
+        m_pOverflowProcessor(nullptr),
+        m_pOverflowNode(nullptr) {}
+  ~CXFA_LayoutContext() { m_pOverflowProcessor = nullptr; }
   CFX_ArrayTemplate<FX_FLOAT>* m_prgSpecifiedColumnWidths;
   FX_FLOAT m_fCurColumnWidth;
   FX_BOOL m_bCurColumnWidthAvaiable;
@@ -68,7 +68,7 @@ class CXFA_ItemLayoutProcessor {
       FX_BOOL bUseBreakControl,
       FX_FLOAT fHeightLimit,
       FX_FLOAT fRealHeight = XFA_LAYOUT_FLOAT_MAX,
-      CXFA_LayoutContext* pContext = NULL);
+      CXFA_LayoutContext* pContext = nullptr);
 
   void GetCurrentComponentPos(FX_FLOAT& fAbsoluteX, FX_FLOAT& fAbsoluteY);
 
@@ -78,7 +78,7 @@ class CXFA_ItemLayoutProcessor {
 
   void SetCurrentComponentSize(FX_FLOAT fWidth, FX_FLOAT fHeight);
   inline CXFA_Node* GetFormNode() { return m_pFormNode; }
-  inline FX_BOOL HasLayoutItem() { return m_pLayoutItem != NULL; }
+  inline FX_BOOL HasLayoutItem() { return !!m_pLayoutItem; }
   CXFA_ContentLayoutItem* ExtractLayoutItem();
 
   static FX_BOOL IncrementRelayoutNode(CXFA_LayoutProcessor* pLayoutProcessor,
@@ -138,14 +138,14 @@ class CXFA_ItemLayoutProcessor {
   CXFA_ContentLayoutItem* CreateContentLayoutItem(CXFA_Node* pFormNode);
 
  protected:
-  void DoLayoutPositionedContainer(CXFA_LayoutContext* pContext = NULL);
+  void DoLayoutPositionedContainer(CXFA_LayoutContext* pContext = nullptr);
   void DoLayoutTableContainer(CXFA_Node* pLayoutNode);
   XFA_ItemLayoutProcessorResult DoLayoutFlowedContainer(
       FX_BOOL bUseBreakControl,
       XFA_ATTRIBUTEENUM eFlowStrategy,
       FX_FLOAT fHeightLimit,
       FX_FLOAT fRealHeight,
-      CXFA_LayoutContext* pContext = NULL,
+      CXFA_LayoutContext* pContext = nullptr,
       FX_BOOL bRootForceTb = FALSE);
   void DoLayoutField();
   void XFA_ItemLayoutProcessor_GotoNextContainerNode(