Cleanup default FWL params part I

xfa/fwl/core/cfwl_scrollbar.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_FWL_CORE_CFWL_SCROLLBAR_H_
 #define XFA_FWL_CORE_CFWL_SCROLLBAR_H_
 
 #include <memory>
@@ skipping 11 matching lines @@
 
 class CFWL_ScrollBar : public CFWL_Widget {
  public:
   CFWL_ScrollBar(const CFWL_App* app,
                  std::unique_ptr<CFWL_WidgetProperties> properties,
                  CFWL_Widget* pOuter);
   ~CFWL_ScrollBar() override;
 
   // CFWL_Widget
   FWL_Type GetClassID() const override;
-  void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
+  void GetWidgetRect(CFX_RectF& rect, bool bAutoSize) override;
   void Update() override;
-  void DrawWidget(CFX_Graphics* pGraphics,
-                  const CFX_Matrix* pMatrix = nullptr) override;
+  void DrawWidget(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix) override;
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
 
   void GetRange(FX_FLOAT* fMin, FX_FLOAT* fMax) const {
     ASSERT(fMin);
     ASSERT(fMax);
     *fMin = m_fRangeMin;
     *fMax = m_fRangeMax;
   }
@@ skipping 95 matching lines @@
   CFX_RectF m_rtThumb;
   CFX_RectF m_rtMinBtn;
   CFX_RectF m_rtMaxBtn;
   CFX_RectF m_rtMinTrack;
   CFX_RectF m_rtMaxTrack;
   FX_FLOAT m_fMinThumb;
   CFWL_ScrollBar::Timer m_Timer;
 };
 
 #endif  // XFA_FWL_CORE_CFWL_SCROLLBAR_H_