Remove GetWidget() overrides

xfa/fwl/core/cfwl_pushbutton.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_pushbutton.h"
 
 #include <memory>
 
 CFWL_PushButton::CFWL_PushButton(const IFWL_App* app) : CFWL_Widget(app) {}
 
 CFWL_PushButton::~CFWL_PushButton() {}
 
 void CFWL_PushButton::Initialize() {
   ASSERT(!m_pIface);
 
   std::unique_ptr<IFWL_PushButton> pPushButton(new IFWL_PushButton(
       m_pApp, m_pProperties->MakeWidgetImpProperties(&m_buttonData)));
   pPushButton->Initialize();
 
   m_pIface = std::move(pPushButton);
   CFWL_Widget::Initialize();
 }
 
-IFWL_PushButton* CFWL_PushButton::GetWidget() {
-  return static_cast<IFWL_PushButton*>(m_pIface.get());
-}
-
-const IFWL_PushButton* CFWL_PushButton::GetWidget() const {
-  return static_cast<IFWL_PushButton*>(m_pIface.get());
-}
-
 FWL_Error CFWL_PushButton::GetCaption(CFX_WideString& wsCaption) {
   wsCaption = m_buttonData.m_wsCaption;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_PushButton::SetCaption(const CFX_WideStringC& wsCaption) {
   m_buttonData.m_wsCaption = wsCaption;
   return FWL_Error::Succeeded;
 }
 
@@ skipping 10 matching lines @@
     IFWL_Widget* pWidget,
     CFX_WideString& wsCaption) {
   wsCaption = m_wsCaption;
   return FWL_Error::Succeeded;
 }
 
 CFX_DIBitmap* CFWL_PushButton::CFWL_PushButtonDP::GetPicture(
     IFWL_Widget* pWidget) {
   return m_pBitmap;
 }