Cleanup unused methods and return values in FWL code.

xfa/fxfa/app/xfa_fwltheme.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_FWLTHEME_H_
 #define XFA_FXFA_APP_XFA_FWLTHEME_H_
 
 #include <memory>
@@ skipping 11 matching lines @@
 #include "xfa/fwl/theme/cfwl_pushbuttontp.h"
 #include "xfa/fwl/theme/cfwl_scrollbartp.h"
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 
 class CXFA_FWLTheme final : public IFWL_ThemeProvider {
  public:
   CXFA_FWLTheme(CXFA_FFApp* pApp);
   ~CXFA_FWLTheme() override;
 
-  FWL_Error Initialize();
-  FWL_Error Finalize();
-
   // IFWL_ThemeProvider:
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
-  FX_BOOL DrawText(CFWL_ThemeText* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawText(CFWL_ThemeText* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
-  FX_BOOL IsCustomizedLayout(IFWL_Widget* pWidget) override;
-  FX_BOOL CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) override;
+  bool IsCustomizedLayout(IFWL_Widget* pWidget) override;
+  void CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) override;
 
- protected:
+ private:
   CFWL_WidgetTP* GetTheme(IFWL_Widget* pWidget);
   std::unique_ptr<CFWL_CheckBoxTP> m_pCheckBoxTP;
   std::unique_ptr<CFWL_ListBoxTP> m_pListBoxTP;
   std::unique_ptr<CFWL_PictureBoxTP> m_pPictureBoxTP;
   std::unique_ptr<CFWL_ScrollBarTP> m_pSrollBarTP;
   std::unique_ptr<CFWL_EditTP> m_pEditTP;
   std::unique_ptr<CFWL_ComboBoxTP> m_pComboBoxTP;
   std::unique_ptr<CFWL_MonthCalendarTP> m_pMonthCalendarTP;
   std::unique_ptr<CFWL_DateTimePickerTP> m_pDateTimePickerTP;
   std::unique_ptr<CFWL_PushButtonTP> m_pPushButtonTP;
   std::unique_ptr<CFWL_CaretTP> m_pCaretTP;
   std::unique_ptr<CFWL_BarcodeTP> m_pBarcodeTP;
   std::unique_ptr<CFDE_TextOut> m_pTextOut;
   FX_FLOAT m_fCapacity;
   uint32_t m_dwCapacity;
   CFGAS_GEFont* m_pCalendarFont;
   CFX_WideString m_wsResource;
   CXFA_FFApp* const m_pApp;
   CFX_RectF m_Rect;
   CFX_SizeF m_SizeAboveBelow;
 };
 
 CXFA_FFWidget* XFA_ThemeGetOuterWidget(IFWL_Widget* pWidget);
 
 #endif  // XFA_FXFA_APP_XFA_FWLTHEME_H_