Cleanup IFWL_Widget visibility and virtual parameters

xfa/fwl/core/cfwl_widget.h

Index: xfa/fwl/core/cfwl_widget.h
diff --git a/xfa/fwl/core/cfwl_widget.h b/xfa/fwl/core/cfwl_widget.h
index b3c09f9738d3eb9092a52855f78720d43b6cd23c..d41de2694d47bda804a2ff5eff9317b1fa1fe9f8 100644
--- a/xfa/fwl/core/cfwl_widget.h
+++ b/xfa/fwl/core/cfwl_widget.h
@@ -26,15 +26,14 @@ class CFWL_Widget {
   IFWL_Widget* GetWidget();
   const IFWL_Widget* GetWidget() const;
 
-  FWL_Error GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false);
-  FWL_Error SetWidgetRect(const CFX_RectF& rect);
-  FWL_Error GetGlobalRect(CFX_RectF& rect);
-  FWL_Error GetClientRect(CFX_RectF& rtClient);
+  void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false);
+  void SetWidgetRect(const CFX_RectF& rect);
+  void GetGlobalRect(CFX_RectF& rect);
+  void GetClientRect(CFX_RectF& rtClient);
 
-  FWL_Error ModifyStyles(uint32_t dwStylesAdded, uint32_t dwStylesRemoved);
+  void ModifyStyles(uint32_t dwStylesAdded, uint32_t dwStylesRemoved);
   uint32_t GetStylesEx();
-  FWL_Error ModifyStylesEx(uint32_t dwStylesExAdded,
-                           uint32_t dwStylesExRemoved);
+  void ModifyStylesEx(uint32_t dwStylesExAdded, uint32_t dwStylesExRemoved);
 
   uint32_t GetStates();
   void SetStates(uint32_t dwStates, bool bSet = true);
@@ -47,8 +46,7 @@ class CFWL_Widget {
 
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
 
-  FWL_Error DrawWidget(CFX_Graphics* pGraphics,
-                       const CFX_Matrix* pMatrix = nullptr);
+  void DrawWidget(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix = nullptr);
 
   IFWL_WidgetDelegate* GetDelegate() const;
   void SetDelegate(IFWL_WidgetDelegate*);