Cleanup unneeded FWL theme code.

xfa/fwl/core/ifwl_themeprovider.h

Index: xfa/fwl/core/ifwl_themeprovider.h
diff --git a/xfa/fwl/core/ifwl_themeprovider.h b/xfa/fwl/core/ifwl_themeprovider.h
index 06f64ba30268d8108c2655acc0c5f1b72e17bb07..275f649574f9c8f5ca71805df3704f1d6eb71767 100644
--- a/xfa/fwl/core/ifwl_themeprovider.h
+++ b/xfa/fwl/core/ifwl_themeprovider.h
@@ -20,25 +20,11 @@ class IFWL_Widget;
 class IFWL_ThemeProvider {
  public:
   virtual ~IFWL_ThemeProvider() {}
-  virtual bool IsValidWidget(IFWL_Widget* pWidget) = 0;
-  virtual uint32_t GetThemeID(IFWL_Widget* pWidget) = 0;
-  virtual uint32_t SetThemeID(IFWL_Widget* pWidget,
-                              uint32_t dwThemeID,
-                              FX_BOOL bChildren = TRUE) = 0;
-  virtual FWL_Error GetThemeMatrix(IFWL_Widget* pWidget,
-                                   CFX_Matrix& matrix) = 0;
-  virtual FWL_Error SetThemeMatrix(IFWL_Widget* pWidget,
-                                   const CFX_Matrix& matrix) = 0;
   virtual FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) = 0;
   virtual FX_BOOL DrawText(CFWL_ThemeText* pParams) = 0;
   virtual void* GetCapacity(CFWL_ThemePart* pThemePart,
                             CFWL_WidgetCapacity dwCapacity) = 0;
   virtual FX_BOOL IsCustomizedLayout(IFWL_Widget* pWidget) = 0;
-  virtual FWL_Error GetPartRect(CFWL_ThemePart* pThemePart,
-                                CFX_RectF& rtPart) = 0;
-  virtual FX_BOOL IsInPart(CFWL_ThemePart* pThemePart,
-                           FX_FLOAT fx,
-                           FX_FLOAT fy) = 0;
   virtual FX_BOOL CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) = 0;
 };