Convert GetWidgetRect to return rect.

xfa/fwl/core/cfwl_checkbox.cpp

Index: xfa/fwl/core/cfwl_checkbox.cpp
diff --git a/xfa/fwl/core/cfwl_checkbox.cpp b/xfa/fwl/core/cfwl_checkbox.cpp
index 4183551f68df61bc0e69bbe1e13c50bf65ec7dcd..97116d45cae0fc5fa6280460360ce8a235a913a8 100644
--- a/xfa/fwl/core/cfwl_checkbox.cpp
+++ b/xfa/fwl/core/cfwl_checkbox.cpp
@@ -50,17 +50,15 @@ void CFWL_CheckBox::SetBoxSize(FX_FLOAT fHeight) {
   m_fBoxHeight = fHeight;
 }
 
-void CFWL_CheckBox::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
-  if (!bAutoSize) {
-    rect = m_pProperties->m_rtWidget;
-    return;
-  }
+CFX_RectF CFWL_CheckBox::GetWidgetRect(bool bAutoSize) {
+  if (!bAutoSize)
+    return m_pProperties->m_rtWidget;
 
-  rect.Set(0, 0, 0, 0);
+  CFX_RectF rect;
   if (!m_pProperties->m_pThemeProvider)
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
   if (!m_pProperties->m_pThemeProvider)
-    return;
+    return rect;
 
   CFX_SizeF sz = CalcTextSize(
       L"Check box", m_pProperties->m_pThemeProvider,
@@ -71,6 +69,7 @@ void CFWL_CheckBox::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
   rect.width += m_fBoxHeight;
   rect.height = std::max(rect.height, m_fBoxHeight);
   InflateWidgetRect(rect);
+  return rect;
 }
 
 void CFWL_CheckBox::Update() {
@@ -308,8 +307,7 @@ void CFWL_CheckBox::NextStates() {
           if (pCheckBox != this &&
               pCheckBox->GetStates() & FWL_STATE_CKB_Checked) {
             pCheckBox->SetCheckState(0);
-            CFX_RectF rt;
-            pCheckBox->GetWidgetRect(rt, false);
+            CFX_RectF rt = pCheckBox->GetWidgetRect(false);
             rt.left = rt.top = 0;
             m_pWidgetMgr->RepaintWidget(pCheckBox, &rt);
             break;