Split CFWL_Widget::GetWidgetRect into two parts

xfa/fwl/core/cfwl_scrollbar.cpp

 // 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
 
 #include "xfa/fwl/core/cfwl_scrollbar.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 59 matching lines @@
 
   rect.Set(0, 0, 0, 0);
   FX_FLOAT* pfMinWidth = static_cast<FX_FLOAT*>(
       GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
   if (!pfMinWidth)
     return;
   if (IsVertical())
     rect.Set(0, 0, (*pfMinWidth), (*pfMinWidth) * 3);
   else
     rect.Set(0, 0, (*pfMinWidth) * 3, (*pfMinWidth));
-  CFWL_Widget::GetWidgetRect(rect, true);
+
+  InflateWidgetRect(rect);
 }
 
 void CFWL_ScrollBar::Update() {
   if (IsLocked())
     return;
   if (!m_pProperties->m_pThemeProvider)
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
 
   Layout();
 }
@@ skipping 421 matching lines @@
 
 void CFWL_ScrollBar::Timer::Run(CFWL_TimerInfo* pTimerInfo) {
   CFWL_ScrollBar* pButton = static_cast<CFWL_ScrollBar*>(m_pWidget);
 
   if (pButton->m_pTimerInfo)
     pButton->m_pTimerInfo->StopTimer();
 
   if (!pButton->SendEvent())
     pButton->m_pTimerInfo = StartTimer(0, true);
 }