Remove IXFA_* interfaces.

xfa/fxfa/app/xfa_ffwidget.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_APP_XFA_FFWIDGET_H_
 #define XFA_FXFA_APP_XFA_FFWIDGET_H_
 
 #include <vector>
@@ skipping 18 matching lines @@
   XFA_WIDGETITEM_NextSibling,
   XFA_WIDGETITEM_PrevSibling,
 };
 class CXFA_CalcData {
  public:
   CXFA_CalcData() : m_iRefCount(0) {}
   ~CXFA_CalcData() { m_Globals.RemoveAll(); }
   CFX_PtrArray m_Globals;
   int32_t m_iRefCount;
 };
-class CXFA_FFWidget : public IXFA_Widget,
-                      public CFX_PrivateData,
-                      public CXFA_ContentLayoutItem {
+class CXFA_FFWidget : public CFX_PrivateData, public CXFA_ContentLayoutItem {
  public:
   CXFA_FFWidget(CXFA_FFPageView* pPageView, CXFA_WidgetAcc* pDataAcc);
   virtual ~CXFA_FFWidget();
-  IXFA_PageView* GetPageView();
-  void SetPageView(IXFA_PageView* pPageView);
+  CXFA_FFPageView* GetPageView();
+  void SetPageView(CXFA_FFPageView* pPageView);
   void GetWidgetRect(CFX_RectF& rtWidget);
   CFX_RectF ReCacheWidgetRect();
   uint32_t GetStatus();
   void ModifyStatus(uint32_t dwAdded, uint32_t dwRemoved);
   virtual FX_BOOL GetBBox(CFX_RectF& rtBox,
                           uint32_t dwStatus,
                           FX_BOOL bDrawFocus = FALSE);
   CXFA_WidgetAcc* GetDataAcc();
   FX_BOOL GetToolTip(CFX_WideString& wsToolTip);
   virtual void RenderWidget(CFX_Graphics* pGS,
@@ skipping 121 matching lines @@
 FX_BOOL XFA_IsCreateWidget(XFA_ELEMENT iType);
 #define XFA_DRAWBOX_ForceRound 1
 #define XFA_DRAWBOX_Lowered3D 2
 void XFA_DrawBox(CXFA_Box box,
                  CFX_Graphics* pGS,
                  const CFX_RectF& rtWidget,
                  CFX_Matrix* pMatrix,
                  uint32_t dwFlags = 0);
 
 #endif  // XFA_FXFA_APP_XFA_FFWIDGET_H_