Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_scrollbar.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_CORE_IFWL_SCROLLBAR_H_
 #define XFA_FWL_CORE_IFWL_SCROLLBAR_H_
 
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
 #include "xfa/fwl/core/fwl_error.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 class CFWL_ScrollBarImpDelegate;
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 
-#define FWL_CLASS_ScrollBar L"FWL_SCROLLBAR"
 #define FWL_STYLEEXT_SCB_Horz (0L << 0)
 #define FWL_STYLEEXT_SCB_Vert (1L << 0)
 
 enum FWL_SCBCODE {
   FWL_SCBCODE_None = 1,
   FWL_SCBCODE_Min,
   FWL_SCBCODE_Max,
   FWL_SCBCODE_PageBackward,
   FWL_SCBCODE_PageForward,
   FWL_SCBCODE_StepBackward,
   FWL_SCBCODE_StepForward,
   FWL_SCBCODE_Pos,
   FWL_SCBCODE_TrackPos,
   FWL_SCBCODE_EndScroll,
 };
 
 class IFWL_ScrollBarDP : public IFWL_DataProvider {};
 
 class IFWL_ScrollBar : public IFWL_Widget, public IFWL_Timer {
  public:
   IFWL_ScrollBar(const CFWL_WidgetImpProperties& properties,
                  IFWL_Widget* pOuter);
   ~IFWL_ScrollBar() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr) override;
 
   // IFWL_Timer
   void Run(IFWL_TimerInfo* pTimerInfo) override;
 
   FX_BOOL IsVertical();
   FWL_Error GetRange(FX_FLOAT& fMin, FX_FLOAT& fMax);
@@ skipping 56 matching lines @@
   FX_BOOL m_bMouseDown;
   FX_BOOL m_bRepaintThumb;
   FX_FLOAT m_fButtonLen;
   FX_BOOL m_bMinSize;
   CFX_RectF m_rtClient;
   CFX_RectF m_rtThumb;
   CFX_RectF m_rtMinBtn;
   CFX_RectF m_rtMaxBtn;
   CFX_RectF m_rtMinTrack;
   CFX_RectF m_rtMaxTrack;
-  FX_BOOL m_bCustomLayout;
+  bool m_bCustomLayout;
   FX_FLOAT m_fMinThumb;
 
  protected:
   IFWL_ScrollBar();
 };
 
 class CFWL_ScrollBarImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_ScrollBarImpDelegate(IFWL_ScrollBar* pOwner);
   void OnProcessMessage(CFWL_Message* pMessage) override;
@@ skipping 25 matching lines @@
                    int32_t& iState,
                    FX_FLOAT fx,
                    FX_FLOAT fy);
   void DoMouseLeave(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
   void DoMouseHover(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
 
   IFWL_ScrollBar* m_pOwner;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_SCROLLBAR_H_