Fix CPDFSDK_FormFillEnvironment destruction order

fpdfsdk/cpdfsdk_formfillenvironment.h

 // Copyright 2016 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_CPDFSDK_FORMFILLENVIRONMENT_H_
 #define FPDFSDK_CPDFSDK_FORMFILLENVIRONMENT_H_
 
 #include <memory>
@@ skipping 94 matching lines @@
   }
 
 #ifdef PDF_ENABLE_XFA
   CPDF_Document* GetPDFDocument() const {
     return m_pUnderlyingDoc ? m_pUnderlyingDoc->GetPDFDoc() : nullptr;
   }
 
   CPDFXFA_Context* GetXFAContext() const { return m_pUnderlyingDoc; }
   void ResetXFADocument() { m_pUnderlyingDoc = nullptr; }
 
-  int GetPageViewCount() const { return m_pageMap.size(); }
+  int GetPageViewCount() const { return m_PageMap.size(); }
 
   void DisplayCaret(FPDF_PAGE page,
                     FPDF_BOOL bVisible,
                     double left,
                     double top,
                     double right,
                     double bottom);
   int GetCurrentPageIndex(FPDF_DOCUMENT document);
   void SetCurrentPage(FPDF_DOCUMENT document, int iCurPage);
 
@@ skipping 80 matching lines @@
   CPDFSDK_AnnotHandlerMgr* GetAnnotHandlerMgr();  // Creates if not present.
   IJS_Runtime* GetJSRuntime();                    // Creates if not present.
   CPDFSDK_ActionHandler* GetActionHander();       // Creates if not present.
   CPDFSDK_InterForm* GetInterForm();              // Creates if not present.
 
  private:
   std::unique_ptr<CPDFSDK_AnnotHandlerMgr> m_pAnnotHandlerMgr;
   std::unique_ptr<CPDFSDK_ActionHandler> m_pActionHandler;
   std::unique_ptr<IJS_Runtime> m_pJSRuntime;
   FPDF_FORMFILLINFO* const m_pInfo;
-  std::map<UnderlyingPageType*, std::unique_ptr<CPDFSDK_PageView>> m_pageMap;
+  std::map<UnderlyingPageType*, std::unique_ptr<CPDFSDK_PageView>> m_PageMap;
   std::unique_ptr<CPDFSDK_InterForm> m_pInterForm;
   CPDFSDK_Annot::ObservedPtr m_pFocusAnnot;
   UnderlyingDocumentType* m_pUnderlyingDoc;
   std::unique_ptr<CFFL_InteractiveFormFiller> m_pFormFiller;
   std::unique_ptr<CFX_SystemHandler> m_pSysHandler;
   bool m_bChangeMask;
   bool m_bBeingDestroyed;
 };
 
 #endif  // FPDFSDK_CPDFSDK_FORMFILLENVIRONMENT_H_