Remove NULL in xfa/

xfa/fxfa/parser/cxfa_box.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fxfa/parser/cxfa_box.h"
 
 #include "xfa/fxfa/parser/cxfa_corner.h"
 #include "xfa/fxfa/parser/xfa_object.h"
 
 namespace {
 
 void GetStrokesInternal(CXFA_Node* pNode,
                         CXFA_StrokeArray& strokes,
-                        FX_BOOL bNULL) {
+                        FX_BOOL bNull) {
   strokes.RemoveAll();
   if (!pNode)
     return;
 
   strokes.SetSize(8);
   int32_t i, j;
   for (i = 0, j = 0; i < 4; i++) {
     CXFA_Corner corner =
         CXFA_Corner(pNode->GetProperty(i, XFA_Element::Corner, i == 0));
     if (corner || i == 0)
       strokes.SetAt(j, corner);
-    else if (bNULL)
+    else if (bNull)
       strokes.SetAt(j, CXFA_Stroke(nullptr));
     else if (i == 1)
       strokes.SetAt(j, strokes[0]);
     else if (i == 2)
       strokes.SetAt(j, strokes[0]);
     else
       strokes.SetAt(j, strokes[2]);
 
     j++;
     CXFA_Edge edge =
         CXFA_Edge(pNode->GetProperty(i, XFA_Element::Edge, i == 0));
     if (edge || i == 0)
       strokes.SetAt(j, edge);
-    else if (bNULL)
+    else if (bNull)
       strokes.SetAt(j, CXFA_Stroke(nullptr));
     else if (i == 1)
       strokes.SetAt(j, strokes[1]);
     else if (i == 2)
       strokes.SetAt(j, strokes[1]);
     else
       strokes.SetAt(j, strokes[3]);
 
     j++;
   }
@@ skipping 99 matching lines @@
   return CXFA_Margin(m_pNode ? m_pNode->GetChild(0, XFA_Element::Margin)
                              : nullptr);
 }
 
 int32_t CXFA_Box::Get3DStyle(FX_BOOL& bVisible, FX_FLOAT& fThickness) const {
   if (IsArc())
     return 0;
 
   CXFA_StrokeArray strokes;
   GetStrokesInternal(m_pNode, strokes, TRUE);
-  CXFA_Stroke stroke(NULL);
+  CXFA_Stroke stroke(nullptr);
   int32_t iType = Style3D(strokes, stroke);
   if (iType) {
     bVisible = stroke.IsVisible();
     fThickness = stroke.GetThickness();
   }
   return iType;
 }