FPDF_PageDelete must delete XFA pages as well.

fpdfsdk/fpdfxfa/fpdfxfa_doc.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_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_string.h"
 #include "fpdfsdk/include/fpdfxfa/fpdfxfa_app.h"
@@ skipping 164 matching lines @@
     CPDFXFA_Page* pTempPage = m_XFAPageList.GetAt(i);
     if (!pTempPage)
       continue;
     if (pTempPage->GetXFAPageView() && pTempPage->GetXFAPageView() == pPage)
       return pTempPage;
   }
 
   return NULL;
 }
 
+void CPDFXFA_Document::DeletePage(int page_index) {
+  if (page_index < 0 || page_index >= m_XFAPageList.GetSize())
+    return;
+
+  if (CPDFXFA_Page* pPage = m_XFAPageList.GetAt(page_index))
+    pPage->Release();
+}
+
 void CPDFXFA_Document::RemovePage(CPDFXFA_Page* page) {
   m_XFAPageList.SetAt(page->GetPageIndex(), NULL);
 }
 
 CPDFSDK_Document* CPDFXFA_Document::GetSDKDocument(
     CPDFDoc_Environment* pFormFillEnv) {
   if (!m_pSDKDoc && pFormFillEnv)
     m_pSDKDoc = new CPDFSDK_Document(this, pFormFillEnv);
   return m_pSDKDoc;
 }
@@ skipping 1052 matching lines @@
   }
 
   return _GetHValueByName(szPropName, hValue,
                           m_pSDKDoc->GetEnv()->GetJSRuntime());
 }
 FX_BOOL CPDFXFA_Document::_GetHValueByName(const CFX_ByteStringC& utf8Name,
                                            FXJSE_HVALUE hValue,
                                            IJS_Runtime* runTime) {
   return runTime->GetHValueByName(utf8Name, hValue);
 }