Fixup MSan embeddertests

fpdfsdk/cpdfsdk_document.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_DOCUMENT_H_
 #define FPDFSDK_CPDFSDK_DOCUMENT_H_
 
 #include <map>
@@ skipping 36 matching lines @@
 #ifdef PDF_ENABLE_XFA
     return m_pDoc ? m_pDoc->GetPDFDoc() : nullptr;
 #else   // PDF_ENABLE_XFA
     return m_pDoc;
 #endif  // PDF_ENABLE_XFA
   }
 
 #ifdef PDF_ENABLE_XFA
   // Gets the XFA document directly (XFA-only).
   CPDFXFA_Document* GetXFADocument() const { return m_pDoc; }
+  void ResetXFADocument() { m_pDoc = nullptr; }
 
   int GetPageViewCount() const { return m_pageMap.size(); }
 #endif  // PDF_ENABLE_XFA
 
   CPDFSDK_PageView* GetPageView(UnderlyingPageType* pPage, bool ReNew);
   CPDFSDK_PageView* GetPageView(int nIndex);
   CPDFSDK_PageView* GetCurrentView();
   void RemovePageView(UnderlyingPageType* pPage);
   void UpdateAllViews(CPDFSDK_PageView* pSender, CPDFSDK_Annot* pAnnot);
 
@@ skipping 30 matching lines @@
   std::map<UnderlyingPageType*, CPDFSDK_PageView*> m_pageMap;
   UnderlyingDocumentType* m_pDoc;
   std::unique_ptr<CPDFSDK_InterForm> m_pInterForm;
   CPDFSDK_Annot::ObservedPtr m_pFocusAnnot;
   CPDFSDK_FormFillEnvironment* m_pEnv;
   FX_BOOL m_bChangeMask;
   FX_BOOL m_bBeingDestroyed;
 };
 
 #endif  // FPDFSDK_CPDFSDK_DOCUMENT_H_