Cleanup CFWL_Widget code to return CFX_RectFs where appropriate

xfa/fwl/cfwl_widgetmgr.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_CFWL_WIDGETMGR_H_
 #define XFA_FWL_CFWL_WIDGETMGR_H_
 
 #include <map>
@@ skipping 24 matching lines @@
   void OnDrawWidget(CFWL_Widget* pWidget,
                     CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
 
   CFWL_Widget* GetParentWidget(CFWL_Widget* pWidget) const;
   CFWL_Widget* GetOwnerWidget(CFWL_Widget* pWidget) const;
   CFWL_Widget* GetNextSiblingWidget(CFWL_Widget* pWidget) const;
   CFWL_Widget* GetFirstChildWidget(CFWL_Widget* pWidget) const;
   CFWL_Widget* GetSystemFormWidget(CFWL_Widget* pWidget) const;
 
-  void RepaintWidget(CFWL_Widget* pWidget, const CFX_RectF* pRect);
+  void RepaintWidget(CFWL_Widget* pWidget, const CFX_RectF& pRect);
 
   void InsertWidget(CFWL_Widget* pParent, CFWL_Widget* pChild);
   void RemoveWidget(CFWL_Widget* pWidget);
   void SetOwner(CFWL_Widget* pOwner, CFWL_Widget* pOwned);
   void SetParent(CFWL_Widget* pParent, CFWL_Widget* pChild);
 
   void SetWidgetRect_Native(CFWL_Widget* pWidget, const CFX_RectF& rect);
 
   CFWL_Widget* GetWidgetAtPoint(CFWL_Widget* pParent, FX_FLOAT fx, FX_FLOAT fy);
 
@@ skipping 68 matching lines @@
 
   uint32_t m_dwCapability;
   std::map<CFWL_Widget*, std::unique_ptr<Item>> m_mapWidgetItem;
   CXFA_FWLAdapterWidgetMgr* const m_pAdapter;
 #if (_FX_OS_ == _FX_WIN32_DESKTOP_) || (_FX_OS_ == _FX_WIN64_)
   CFX_RectF m_rtScreen;
 #endif
 };
 
 #endif  // XFA_FWL_CFWL_WIDGETMGR_H_