Change IFWL_Widget to store a single delegate.

xfa/fxfa/app/xfa_fffield.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_FFFIELD_H_
 #define XFA_FXFA_APP_XFA_FFFIELD_H_
 
 #include "xfa/fwl/core/cfwl_widget.h"
-#include "xfa/fwl/core/ifwl_widgetdelegate.h"
 #include "xfa/fxfa/xfa_ffpageview.h"
 #include "xfa/fxfa/xfa_ffwidget.h"
 
 #define XFA_MINUI_HEIGHT 4.32f
 #define XFA_DEFAULTUI_HEIGHT 2.0f
 
-class CXFA_FFField : public CXFA_FFWidget, public IFWL_WidgetDelegate {
+class CXFA_FFField : public CXFA_FFWidget {
  public:
   CXFA_FFField(CXFA_FFPageView* pPageView, CXFA_WidgetAcc* pDataAcc);
   ~CXFA_FFField() override;
 
   // CXFA_FFWidget
   FX_BOOL GetBBox(CFX_RectF& rtBox,
                   uint32_t dwStatus,
                   FX_BOOL bDrawFocus = FALSE) override;
   void RenderWidget(CFX_Graphics* pGS,
                     CFX_Matrix* pMatrix,
@@ skipping 17 matching lines @@
   FX_BOOL OnRButtonDblClk(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) override;
 
   FX_BOOL OnSetFocus(CXFA_FFWidget* pOldWidget) override;
   FX_BOOL OnKillFocus(CXFA_FFWidget* pNewWidget) override;
   FX_BOOL OnKeyDown(uint32_t dwKeyCode, uint32_t dwFlags) override;
   FX_BOOL OnKeyUp(uint32_t dwKeyCode, uint32_t dwFlags) override;
   FX_BOOL OnChar(uint32_t dwChar, uint32_t dwFlags) override;
   FWL_WidgetHit OnHitTest(FX_FLOAT fx, FX_FLOAT fy) override;
   FX_BOOL OnSetCursor(FX_FLOAT fx, FX_FLOAT fy) override;
 
-  // IFWL_WidgetDelegate
-  void OnProcessMessage(CFWL_Message* pMessage) override;
-  void OnProcessEvent(CFWL_Event* pEvent) override;
-  void OnDrawWidget(CFX_Graphics* pGraphics,
-                    const CFX_Matrix* pMatrix = nullptr) override;
-
   void UpdateFWL();
   uint32_t UpdateUIProperty();
 
+  CFWL_Widget* GetNormalWidget() { return m_pNormalWidget; }
+  FX_BOOL ProcessCommittedData();
+
  protected:
   FX_BOOL PtInActiveRect(FX_FLOAT fx, FX_FLOAT fy) override;
 
   virtual void SetFWLRect();
   void SetFWLThemeProvider();
-  CFWL_Widget* GetNormalWidget() { return m_pNormalWidget; }
   void FWLToClient(FX_FLOAT& fx, FX_FLOAT& fy);
   void LayoutCaption();
   void RenderCaption(CFX_Graphics* pGS, CFX_Matrix* pMatrix = nullptr);
 
   int32_t CalculateOverride();
   int32_t CalculateWidgetAcc(CXFA_WidgetAcc* pAcc);
-  FX_BOOL ProcessCommittedData();
+
   virtual FX_BOOL CommitData();
   virtual FX_BOOL IsDataChanged();
   void DrawHighlight(CFX_Graphics* pGS,
                      CFX_Matrix* pMatrix,
                      uint32_t dwStatus,
                      FX_BOOL bEllipse = FALSE);
   void DrawFocus(CFX_Graphics* pGS, CFX_Matrix* pMatrix);
   void TranslateFWLMessage(CFWL_Message* pMessage);
   void CapPlacement();
   void CapTopBottomPlacement(CXFA_Caption caption,
                              const CFX_RectF& rtWidget,
                              int32_t iCapPlacement);
   void CapLeftRightPlacement(CXFA_Caption caption,
                              const CFX_RectF& rtWidget,
                              int32_t iCapPlacement);
   void SetEditScrollOffset();
 
   CFWL_Widget* m_pNormalWidget;
   CFX_RectF m_rtUI;
   CFX_RectF m_rtCaption;
 };
 
 #endif  // XFA_FXFA_APP_XFA_FFFIELD_H_