Cleanup remaining IFWL files for visiblity and usage.

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>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_error.h"
 
-namespace {
-
-IFWL_CheckBox* ToCheckBox(IFWL_Widget* widget) {
-  return static_cast<IFWL_CheckBox*>(widget);
-}
-
-}  // namespace
-
 CFWL_CheckBox::CFWL_CheckBox(const IFWL_App* app)
     : CFWL_Widget(app), m_fBoxHeight(16.0f), m_wsCaption(L"Check box") {}
 
 CFWL_CheckBox::~CFWL_CheckBox() {}
 
 void CFWL_CheckBox::Initialize() {
   ASSERT(!m_pIface);
 
   m_pIface = pdfium::MakeUnique<IFWL_CheckBox>(
       m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>(this));
 
   CFWL_Widget::Initialize();
 }
 
-FWL_Error CFWL_CheckBox::SetCaption(const CFX_WideStringC& wsCaption) {
-  m_wsCaption = wsCaption;
-  return FWL_Error::Succeeded;
-}
-
-FWL_Error CFWL_CheckBox::SetBoxSize(FX_FLOAT fHeight) {
+void CFWL_CheckBox::SetBoxSize(FX_FLOAT fHeight) {
   m_fBoxHeight = fHeight;
-  return FWL_Error::Succeeded;
-}
-
-int32_t CFWL_CheckBox::GetCheckState() {
-  return ToCheckBox(GetWidget())->GetCheckState();
-}
-
-FWL_Error CFWL_CheckBox::SetCheckState(int32_t iCheck) {
-  return ToCheckBox(GetWidget())->SetCheckState(iCheck);
 }
 
 void CFWL_CheckBox::GetCaption(IFWL_Widget* pWidget,
                                CFX_WideString& wsCaption) {
   wsCaption = m_wsCaption;
 }
 
 FX_FLOAT CFWL_CheckBox::GetBoxSize(IFWL_Widget* pWidget) {
   return m_fBoxHeight;
 }