Continue cleaning IFWL classes

xfa/fwl/core/ifwl_spinbutton.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/ifwl_spinbutton.h"
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/cfwl_message.h"
@@ skipping 92 matching lines @@
   IFWL_ThemeProvider* pTheme = GetAvailableTheme();
   if (HasBorder())
     DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
   if (HasEdge())
     DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
 
   DrawUpButton(pGraphics, pTheme, pMatrix);
   DrawDownButton(pGraphics, pTheme, pMatrix);
 }
 
-FWL_Error IFWL_SpinButton::EnableButton(bool bEnable, bool bUp) {
+void IFWL_SpinButton::EnableButton(bool bEnable, bool bUp) {
   if (bUp)
     m_dwUpState = bEnable ? CFWL_PartState_Normal : CFWL_PartState_Disabled;
   else
     m_dwDnState = bEnable ? CFWL_PartState_Normal : CFWL_PartState_Disabled;
-
-  return FWL_Error::Succeeded;
 }
 
 bool IFWL_SpinButton::IsButtonEnable(bool bUp) {
   if (bUp)
     return (m_dwUpState != CFWL_PartState_Disabled);
   return (m_dwDnState != CFWL_PartState_Disabled);
 }
 
 void IFWL_SpinButton::DrawUpButton(CFX_Graphics* pGraphics,
                                    IFWL_ThemeProvider* pTheme,
@@ skipping 247 matching lines @@
   IFWL_SpinButton* pButton = static_cast<IFWL_SpinButton*>(m_pWidget);
 
   if (!pButton->m_pTimerInfo)
     return;
 
   CFWL_EvtSpbClick wmPosChanged;
   wmPosChanged.m_pSrcTarget = pButton;
   wmPosChanged.m_bUp = pButton->m_iButtonIndex == 0;
   pButton->DispatchEvent(&wmPosChanged);
 }