Remove CFX_PtrList from renderer main loop.

core/src/fpdfapi/fpdf_edit/fpdf_edit_content.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/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_page.h"
 #include "core/include/fpdfapi/fpdf_serial.h"
 #include "core/src/fpdfapi/fpdf_page/pageint.h"
 
 CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& ar, CFX_Matrix& matrix) {
   ar << matrix.a << " " << matrix.b << " " << matrix.c << " " << matrix.d << " "
      << matrix.e << " " << matrix.f;
   return ar;
 }
+
 CPDF_PageContentGenerator::CPDF_PageContentGenerator(CPDF_Page* pPage)
-    : m_pPage(pPage) {
-  m_pDocument = NULL;
-  if (m_pPage) {
-    m_pDocument = m_pPage->m_pDocument;
-  }
-  FX_POSITION pos = pPage->GetPageObjectList()->GetHeadPosition();
-  while (pos) {
-    InsertPageObject(pPage->GetPageObjectList()->GetNextObject(pos));
-  }
+    : m_pPage(pPage), m_pDocument(m_pPage->m_pDocument) {
+  for (const auto& pObj : *pPage->GetPageObjectList())
+    InsertPageObject(pObj.get());
 }
-CPDF_PageContentGenerator::~CPDF_PageContentGenerator() {}
+
 FX_BOOL CPDF_PageContentGenerator::InsertPageObject(
     CPDF_PageObject* pPageObject) {
-  if (!pPageObject) {
-    return FALSE;
-  }
-  return m_pageObjects.Add(pPageObject);
+  return pPageObject && m_pageObjects.Add(pPageObject);
 }
+
 void CPDF_PageContentGenerator::GenerateContent() {
   CFX_ByteTextBuf buf;
   CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict;
   for (int i = 0; i < m_pageObjects.GetSize(); ++i) {
     CPDF_PageObject* pPageObj = m_pageObjects[i];
     if (!pPageObj || pPageObj->m_Type != CPDF_PageObject::IMAGE) {
       continue;
     }
     ProcessImage(buf, (CPDF_ImageObject*)pPageObj);
   }
@@ skipping 110 matching lines @@
     CPDF_StreamAcc contentStream;
     contentStream.LoadAllData(pStream);
     ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
   }
   CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument,
                                        pStream->GetObjNum());
 }