Cleanup default FWL params part I

xfa/fwl/core/cfwl_combobox.h

Index: xfa/fwl/core/cfwl_combobox.h
diff --git a/xfa/fwl/core/cfwl_combobox.h b/xfa/fwl/core/cfwl_combobox.h
index b9f489758660abaea73c07a5150b63f178bc7d2b..b9fda09865f06527fe282504567e06a88ce14525 100644
--- a/xfa/fwl/core/cfwl_combobox.h
+++ b/xfa/fwl/core/cfwl_combobox.h
@@ -57,11 +57,11 @@ class CFWL_ComboBox : public CFWL_Widget {
   void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
   void ModifyStylesEx(uint32_t dwStylesExAdded,
                       uint32_t dwStylesExRemoved) override;
-  void SetStates(uint32_t dwStates, bool bSet = true) override;
+  void SetStates(uint32_t dwStates) override;
+  void RemoveStates(uint32_t dwStates) override;
   void Update() override;
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
-  void DrawWidget(CFX_Graphics* pGraphics,
-                  const CFX_Matrix* pMatrix = nullptr) override;
+  void DrawWidget(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix) override;
   void SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) override;
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;