Cleanup unused methods and return values in FWL code.

xfa/fwl/theme/cfwl_widgettp.h

Index: xfa/fwl/theme/cfwl_widgettp.h
diff --git a/xfa/fwl/theme/cfwl_widgettp.h b/xfa/fwl/theme/cfwl_widgettp.h
index ddd504b05040dbb92c18afa9666ed2e606e35bf6..02f39810772c11ad05e1af09566e0d57b74b01fc 100644
--- a/xfa/fwl/theme/cfwl_widgettp.h
+++ b/xfa/fwl/theme/cfwl_widgettp.h
@@ -107,36 +107,36 @@ class CFWL_WidgetTP {
  public:
   virtual ~CFWL_WidgetTP();
 
-  virtual FWL_Error Initialize();
-  virtual FWL_Error Finalize();
+  virtual void Initialize();
+  virtual void Finalize();
 
   virtual bool IsValidWidget(IFWL_Widget* pWidget);
   virtual uint32_t GetThemeID(IFWL_Widget* pWidget);
   virtual uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID);
-  virtual FWL_Error GetThemeMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix);
-  virtual FWL_Error SetThemeMatrix(IFWL_Widget* pWidget,
-                                   const CFX_Matrix& matrix);
-  virtual FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams);
-  virtual FX_BOOL DrawText(CFWL_ThemeText* pParams);
+
+  virtual void DrawBackground(CFWL_ThemeBackground* pParams);
+  virtual void DrawText(CFWL_ThemeText* pParams);
   virtual void* GetCapacity(CFWL_ThemePart* pThemePart,
                             CFWL_WidgetCapacity dwCapacity);
-  virtual FX_BOOL IsCustomizedLayout(IFWL_Widget* pWidget);
-  virtual FX_BOOL CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect);
+  virtual bool IsCustomizedLayout(IFWL_Widget* pWidget);
+  virtual void CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect);
 
-  FWL_Error SetFont(IFWL_Widget* pWidget,
-                    const FX_WCHAR* strFont,
-                    FX_FLOAT fFontSize,
-                    FX_ARGB rgbFont);
-  FWL_Error SetFont(IFWL_Widget* pWidget,
-                    CFGAS_GEFont* pFont,
-                    FX_FLOAT fFontSize,
-                    FX_ARGB rgbFont);
+  void SetFont(IFWL_Widget* pWidget,
+               const FX_WCHAR* strFont,
+               FX_FLOAT fFontSize,
+               FX_ARGB rgbFont);
+  void SetFont(IFWL_Widget* pWidget,
+               CFGAS_GEFont* pFont,
+               FX_FLOAT fFontSize,
+               FX_ARGB rgbFont);
   CFGAS_GEFont* GetFont(IFWL_Widget* pWidget);
 
  protected:
   CFWL_WidgetTP();
-  FWL_Error InitTTO();
-  FWL_Error FinalizeTTO();
+
+  void InitTTO();
+  void FinalizeTTO();
+
   void DrawEdge(CFX_Graphics* pGraphics,
                 uint32_t dwStyles,
                 const CFX_RectF* pRect,
@@ -219,7 +219,6 @@ class CFWL_WidgetTP {
   uint32_t m_dwValue;
   CFX_RectF m_rtMargin;
   uint32_t m_dwThemeID;
-  CFX_Matrix _ctm;
 };
 
 void FWLTHEME_Release();