Convert FWL_ERR into an enum class.

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"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fxgraphics/cfx_color.h"
 
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 class CFWL_CaretImpDelegate;
 
 class CFWL_CaretImp : public CFWL_WidgetImp {
  public:
   CFWL_CaretImp(const CFWL_WidgetImpProperties& properties,
                 IFWL_Widget* pOuter);
   virtual ~CFWL_CaretImp();
 
-  virtual FWL_ERR GetClassName(CFX_WideString& wsClass) const;
+  virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
   virtual uint32_t GetClassID() const;
 
-  virtual FWL_ERR Initialize();
-  virtual FWL_ERR Finalize();
+  virtual FWL_Error Initialize();
+  virtual FWL_Error Finalize();
 
-  virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
-                             const CFX_Matrix* pMatrix = NULL);
+  virtual FWL_Error DrawWidget(CFX_Graphics* pGraphics,
+                               const CFX_Matrix* pMatrix = NULL);
 
-  virtual FWL_ERR 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);
+  virtual FWL_Error ShowCaret(FX_BOOL bFlag = TRUE);
+  virtual FWL_Error GetFrequency(uint32_t& elapse);
+  virtual FWL_Error SetFrequency(uint32_t elapse);
+  virtual FWL_Error SetColor(CFX_Color crFill);
 
  protected:
-  FX_BOOL DrawCaretBK(CFX_Graphics* pGraphics,
-                      IFWL_ThemeProvider* pTheme,
-                      const CFX_Matrix* pMatrix);
+  void DrawCaretBK(CFX_Graphics* pGraphics,
+                   IFWL_ThemeProvider* pTheme,
+                   const CFX_Matrix* pMatrix);
   class CFWL_CaretTimer : public IFWL_Timer {
    public:
     explicit CFWL_CaretTimer(CFWL_CaretImp* pCaret);
     ~CFWL_CaretTimer() override {}
     int32_t Run(FWL_HTIMER hTimer) override;
     CFWL_CaretImp* const m_pCaret;
   };
   CFWL_CaretTimer* m_pTimer;
   FWL_HTIMER m_hTimer;
   uint32_t m_dwElapse;
   CFX_Color m_crFill;
   FX_BOOL m_bSetColor;
   friend class CFWL_CaretImpDelegate;
   friend class CFWL_CaretTimer;
 };
 class CFWL_CaretImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_CaretImpDelegate(CFWL_CaretImp* pOwner);
-  int32_t OnProcessMessage(CFWL_Message* pMessage) override;
-  FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
-                       const CFX_Matrix* pMatrix = NULL) override;
+  void OnProcessMessage(CFWL_Message* pMessage) override;
+  void OnDrawWidget(CFX_Graphics* pGraphics,
+                    const CFX_Matrix* pMatrix = NULL) override;
 
  protected:
   CFWL_CaretImp* m_pOwner;
 };
 
 #endif  // XFA_FWL_BASEWIDGET_FWL_CARETIMP_H_