Convert GetWidgetRect to return rect.

xfa/fwl/core/cfwl_scrollbar.cpp

Index: xfa/fwl/core/cfwl_scrollbar.cpp
diff --git a/xfa/fwl/core/cfwl_scrollbar.cpp b/xfa/fwl/core/cfwl_scrollbar.cpp
index 8b3ce51195f36b02ad6f44b058fbdb952d46a278..f76d4027a20e1c465cb1074deff4b5d675a1c395 100644
--- a/xfa/fwl/core/cfwl_scrollbar.cpp
+++ b/xfa/fwl/core/cfwl_scrollbar.cpp
@@ -62,23 +62,23 @@ FWL_Type CFWL_ScrollBar::GetClassID() const {
   return FWL_Type::ScrollBar;
 }
 
-void CFWL_ScrollBar::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
-  if (!bAutoSize) {
-    rect = m_pProperties->m_rtWidget;
-    return;
-  }
+CFX_RectF CFWL_ScrollBar::GetWidgetRect(bool bAutoSize) {
+  if (!bAutoSize)
+    return m_pProperties->m_rtWidget;
 
-  rect.Set(0, 0, 0, 0);
+  CFX_RectF rect;
   FX_FLOAT* pfMinWidth = static_cast<FX_FLOAT*>(
       GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
   if (!pfMinWidth)
-    return;
+    return rect;
+
   if (IsVertical())
     rect.Set(0, 0, (*pfMinWidth), (*pfMinWidth) * 3);
   else
     rect.Set(0, 0, (*pfMinWidth) * 3, (*pfMinWidth));
 
   InflateWidgetRect(rect);
+  return rect;
 }
 
 void CFWL_ScrollBar::Update() {