Fix GetPageIndex() for dynamic XFA documents.

xfa/fxfa/include/xfa_ffpageview.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 XFA_FXFA_INCLUDE_XFA_FFPAGEVIEW_H_
 #define XFA_FXFA_INCLUDE_XFA_FFPAGEVIEW_H_
 
 #include "xfa/fxfa/parser/xfa_doclayout.h"
 
 class CXFA_FFWidget;
 class CXFA_FFDocView;
 
 class CXFA_FFPageView : public CXFA_ContainerLayoutItem {
  public:
   CXFA_FFPageView(CXFA_FFDocView* pDocView, CXFA_Node* pPageArea);
   ~CXFA_FFPageView() override;
 
   CXFA_FFDocView* GetDocView() const;
-  int32_t GetPageViewIndex() const;
   void GetPageViewRect(CFX_RectF& rtPage) const;
   void GetDisplayMatrix(CFX_Matrix& mt,
                         const CFX_Rect& rtDisp,
                         int32_t iRotate) const;
   IXFA_WidgetIterator* CreateWidgetIterator(
       uint32_t dwTraverseWay = XFA_TRAVERSEWAY_Form,
       uint32_t dwWidgetFilter = XFA_WidgetStatus_Visible |
                                 XFA_WidgetStatus_Viewable);
 
  protected:
@@ skipping 64 matching lines @@
                       FX_BOOL bMarsterPage = FALSE);
 
   CXFA_WidgetArray m_TabOrderWidgetArray;
   CXFA_FFPageView* m_pPageView;
   uint32_t m_dwFilter;
   int32_t m_iCurWidget;
   FX_BOOL m_bIgnorerelevant;
 };
 
 #endif  // XFA_FXFA_INCLUDE_XFA_FFPAGEVIEW_H_