Continue IFWL widget cleanup.

xfa/fwl/core/cfwl_checkbox.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_checkbox.h"
 
 #include <memory>
 
@@ skipping 33 matching lines @@
 }
 
 int32_t CFWL_CheckBox::GetCheckState() {
   return ToCheckBox(GetWidget())->GetCheckState();
 }
 
 FWL_Error CFWL_CheckBox::SetCheckState(int32_t iCheck) {
   return ToCheckBox(GetWidget())->SetCheckState(iCheck);
 }
 
-FWL_Error CFWL_CheckBox::GetCaption(IFWL_Widget* pWidget,
-                                    CFX_WideString& wsCaption) {
+void CFWL_CheckBox::GetCaption(IFWL_Widget* pWidget,
+                               CFX_WideString& wsCaption) {
   wsCaption = m_wsCaption;
-  return FWL_Error::Succeeded;
 }
 
 FX_FLOAT CFWL_CheckBox::GetBoxSize(IFWL_Widget* pWidget) {
   return m_fBoxHeight;
 }