Change _PDF_RenderItem to CPDF_RenderContext::Layer.

fpdfsdk/src/fpdfview.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 "public/fpdfview.h"
 
 #include <memory>
 
@@ skipping 721 matching lines @@
 
   FX_RECT clip;
   clip.left = start_x;
   clip.right = start_x + size_x;
   clip.top = start_y;
   clip.bottom = start_y + size_y;
   pContext->m_pDevice->SaveState();
   pContext->m_pDevice->SetClip_Rect(&clip);
 
   pContext->m_pContext = new CPDF_RenderContext(pPage);
-  pContext->m_pContext->AppendObjectList(pPage, &matrix);
+  pContext->m_pContext->AppendLayer(pPage, &matrix);
 
   if (flags & FPDF_ANNOT) {
     pContext->m_pAnnots = new CPDF_AnnotList(pPage);
     FX_BOOL bPrinting = pContext->m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
     pContext->m_pAnnots->DisplayAnnots(pPage, pContext->m_pContext, bPrinting,
                                        &matrix, TRUE, NULL);
   }
 
   pContext->m_pRenderer = new CPDF_ProgressiveRenderer(
       pContext->m_pContext, pContext->m_pDevice, pContext->m_pOptions);
@@ skipping 160 matching lines @@
   if (!buffer) {
     *buflen = len;
   } else if (*buflen >= len) {
     memcpy(buffer, utf16Name.c_str(), len);
     *buflen = len;
   } else {
     *buflen = -1;
   }
   return (FPDF_DEST)pDestObj;
 }