Cleanup IFWL_Adapter interfaces.

xfa/fwl/basewidget/fwl_caretimp.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_FWL_BASEWIDGET_FWL_CARETIMP_H_
 #define XFA_FWL_BASEWIDGET_FWL_CARETIMP_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
@@ skipping 12 matching lines @@
 
   virtual FWL_ERR GetClassName(CFX_WideString& wsClass) const;
   virtual uint32_t GetClassID() const;
 
   virtual FWL_ERR Initialize();
   virtual FWL_ERR Finalize();
 
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
 
-  virtual FWL_ERR ShowCaret(FX_BOOL bFlag = TRUE);
+  virtual void ShowCaret(FX_BOOL bFlag = TRUE);
   virtual FWL_ERR GetFrequency(uint32_t& elapse);
   virtual FWL_ERR SetFrequency(uint32_t elapse);
   virtual FWL_ERR SetColor(CFX_Color crFill);
 
  protected:
   FX_BOOL DrawCaretBK(CFX_Graphics* pGraphics,
                       IFWL_ThemeProvider* pTheme,
                       const CFX_Matrix* pMatrix);
   class CFWL_CaretTimer : public IFWL_Timer {
    public:
@@ skipping 15 matching lines @@
   CFWL_CaretImpDelegate(CFWL_CaretImp* pOwner);
   int32_t OnProcessMessage(CFWL_Message* pMessage) override;
   FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = NULL) override;
 
  protected:
   CFWL_CaretImp* m_pOwner;
 };
 
 #endif  // XFA_FWL_BASEWIDGET_FWL_CARETIMP_H_