Convert GetWidgetRect to return rect.

xfa/fwl/core/cfwl_listbox.cpp

Index: xfa/fwl/core/cfwl_listbox.cpp
diff --git a/xfa/fwl/core/cfwl_listbox.cpp b/xfa/fwl/core/cfwl_listbox.cpp
index 5dd37d15d7b38a6fc1594c4b8974e604175457d4..4fbe4810281d7c28bdb6b3d5b0d1ac39c2da2a84 100644
--- a/xfa/fwl/core/cfwl_listbox.cpp
+++ b/xfa/fwl/core/cfwl_listbox.cpp
@@ -49,19 +49,18 @@ FWL_Type CFWL_ListBox::GetClassID() const {
   return FWL_Type::ListBox;
 }
 
-void CFWL_ListBox::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
-  if (!bAutoSize) {
-    rect = m_pProperties->m_rtWidget;
-    return;
-  }
+CFX_RectF CFWL_ListBox::GetWidgetRect(bool bAutoSize) {
+  if (!bAutoSize)
+    return m_pProperties->m_rtWidget;
 
-  rect.Set(0, 0, 0, 0);
   if (!m_pProperties->m_pThemeProvider)
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
 
   CFX_SizeF fs = CalcSize(true);
+  CFX_RectF rect;
   rect.Set(0, 0, fs.x, fs.y);
   InflateWidgetRect(rect);
+  return rect;
 }
 
 void CFWL_ListBox::Update() {
@@ -95,14 +94,12 @@ void CFWL_ListBox::Update() {
 
 FWL_WidgetHit CFWL_ListBox::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (IsShowScrollBar(false)) {
-    CFX_RectF rect;
-    m_pHorzScrollBar->GetWidgetRect(rect, false);
+    CFX_RectF rect = m_pHorzScrollBar->GetWidgetRect(false);
     if (rect.Contains(fx, fy))
       return FWL_WidgetHit::HScrollBar;
   }
   if (IsShowScrollBar(true)) {
-    CFX_RectF rect;
-    m_pVertScrollBar->GetWidgetRect(rect, false);
+    CFX_RectF rect = m_pVertScrollBar->GetWidgetRect(false);
     if (rect.Contains(fx, fy))
       return FWL_WidgetHit::VScrollBar;
   }