Cleanup the FF Handler proxy methods.

fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h

 // 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
 
 #ifndef FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_
 #define FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_
 
 #include <vector>
 
 #include "public/fpdfview.h"
 #include "xfa/include/fxfa/fxfa.h"
+#include "xfa/include/fxfa/xfa_ffdoc.h"
 #include "xfa/include/fxfa/xfa_ffdochandler.h"
 
 class CPDFXFA_App;
 class CPDFXFA_Document;
 class CPDFXFA_Page;
 class CPDFSDK_Document;
 class CPDFDoc_Environment;
 class IJS_Runtime;
 class IJS_Context;
 class CXFA_FFDocHandler;
@@ skipping 181 matching lines @@
   void _ClearChangeMark();
 
  private:
   enum LoadStatus {
     FXFA_LOADSTATUS_PRELOAD = 0,
     FXFA_LOADSTATUS_LOADING,
     FXFA_LOADSTATUS_LOADED,
     FXFA_LOADSTATUS_CLOSING,
     FXFA_LOADSTATUS_CLOSED
   };
+
   void CloseXFADoc(CXFA_FFDocHandler* pDoc) {
     if (pDoc) {
-      pDoc->CloseDoc(m_pXFADoc);
-      pDoc->ReleaseDoc(m_pXFADoc);
-      m_pXFADoc = NULL;
-      m_pXFADocView = NULL;
+      m_pXFADoc->CloseDoc();
+      delete m_pXFADoc;
+      m_pXFADoc = nullptr;
+      m_pXFADocView = nullptr;
     }
   }
 
   int m_iDocType;
   CPDF_Document* m_pPDFDoc;
   CPDFSDK_Document* m_pSDKDoc;
   CXFA_FFDoc* m_pXFADoc;
   CXFA_FFDocView* m_pXFADocView;
   CPDFXFA_App* m_pApp;
   IJS_Context* m_pJSContext;
   CFX_ArrayTemplate<CPDFXFA_Page*> m_XFAPageList;
   LoadStatus m_nLoadStatus;
   int m_nPageCount;
 };
 
 #endif  // FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_