Clean up CPDF_Page.

core/fpdfdoc/doc_formcontrol.cpp

 // Copyright 2014 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 <algorithm>
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
@@ skipping 158 matching lines @@
   }
   CFX_FloatRect form_bbox = pStream->GetDict()->GetRectBy("BBox");
   CFX_Matrix form_matrix = pStream->GetDict()->GetMatrixBy("Matrix");
   form_matrix.TransformRect(form_bbox);
   CFX_FloatRect arect = m_pWidgetDict->GetRectBy("Rect");
   CFX_Matrix matrix;
   matrix.MatchRect(arect, form_bbox);
   matrix.Concat(*pMatrix);
   CPDF_Form form(m_pField->m_pForm->m_pDocument,
                  m_pField->m_pForm->m_pFormDict->GetDictBy("DR"), pStream);
-  form.ParseContent(NULL, NULL, NULL, NULL);
+  form.ParseContent(nullptr, nullptr, nullptr);
   CPDF_RenderContext context(pPage);
   context.AppendLayer(&form, &matrix);
   context.Render(pDevice, pOptions, nullptr);
 }
 static const FX_CHAR* const g_sHighlightingMode[] = {
     // Must match order of HiglightingMode enum.
     "N", "I", "O", "P", "T", nullptr};
 CPDF_FormControl::HighlightingMode CPDF_FormControl::GetHighlightingMode() {
   if (!m_pWidgetDict) {
     return Invert;
@@ skipping 238 matching lines @@
 }
 
 CPDF_IconFit CPDF_ApSettings::GetIconFit() const {
   return CPDF_IconFit(m_pDict ? m_pDict->GetDictBy("IF") : nullptr);
 }
 
 int CPDF_ApSettings::GetTextPosition() const {
   return m_pDict ? m_pDict->GetIntegerBy("TP", TEXTPOS_CAPTION)
                  : TEXTPOS_CAPTION;
 }