Clean up CPDF_TextRenderer slightly.

core/fpdfapi/fpdf_render/fpdf_render.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 "core/fpdfapi/fpdf_render/render_int.h"
 
 #include "core/fpdfapi/fpdf_font/cpdf_type3char.h"
 #include "core/fpdfapi/fpdf_font/cpdf_type3font.h"
@@ skipping 798 matching lines @@
       CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
       if (!textobj) {
         break;
       }
       CFX_Matrix text_matrix;
       textobj->GetTextMatrix(&text_matrix);
       CPDF_TextRenderer::DrawTextPath(
           &text_device, textobj->m_nChars, textobj->m_pCharCodes,
           textobj->m_pCharPos, textobj->m_TextState.GetFont(),
           textobj->m_TextState.GetFontSize(), &text_matrix, &new_matrix,
-          textobj->m_GraphState, (FX_ARGB)-1, 0, NULL);
+          textobj->m_GraphState, (FX_ARGB)-1, 0, nullptr, 0);
     }
   }
   CPDF_RenderStatus bitmap_render;
   bitmap_render.Initialize(m_pContext, &bitmap_device, NULL, m_pStopObj, NULL,
                            NULL, &m_Options, 0, m_bDropObjects, pFormResource,
                            TRUE);
   bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
   m_bStopped = bitmap_render.m_bStopped;
   if (pSMaskDict) {
     CFX_Matrix smask_matrix;
@@ skipping 460 matching lines @@
   m_pContext->GetBackground(m_pBitmapDevice->GetBitmap(), m_pObject, pOptions,
                             &m_Matrix);
   return TRUE;
 }
 void CPDF_ScaledRenderBuffer::OutputToDevice() {
   if (m_pBitmapDevice) {
     m_pDevice->StretchDIBits(m_pBitmapDevice->GetBitmap(), m_Rect.left,
                              m_Rect.top, m_Rect.Width(), m_Rect.Height());
   }
 }