Convert GetWidgetRect to return rect.

xfa/fwl/core/cfwl_pushbutton.cpp

Index: xfa/fwl/core/cfwl_pushbutton.cpp
diff --git a/xfa/fwl/core/cfwl_pushbutton.cpp b/xfa/fwl/core/cfwl_pushbutton.cpp
index a2f9b5f1cf99e63c1e24470e72aaabed9f8a7275..d210b02b31bd5d9b4550cfcfbb56d319a7bde4cc 100644
--- a/xfa/fwl/core/cfwl_pushbutton.cpp
+++ b/xfa/fwl/core/cfwl_pushbutton.cpp
@@ -35,20 +35,19 @@ FWL_Type CFWL_PushButton::GetClassID() const {
   return FWL_Type::PushButton;
 }
 
-void CFWL_PushButton::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
-  if (!bAutoSize) {
-    rect = m_pProperties->m_rtWidget;
-    return;
-  }
+CFX_RectF CFWL_PushButton::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();
 
   FX_FLOAT* fcaption =
       static_cast<FX_FLOAT*>(GetThemeCapacity(CFWL_WidgetCapacity::Margin));
+  CFX_RectF rect;
   rect.Inflate(*fcaption, *fcaption);
   InflateWidgetRect(rect);
+  return rect;
 }
 
 void CFWL_PushButton::SetStates(uint32_t dwStates) {