Convert FWL_ERR into an enum class.

xfa/fxfa/app/xfa_ffchoicelist.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/fxfa/app/xfa_ffchoicelist.h"
 
 #include "xfa/fwl/basewidget/ifwl_edit.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
@@ skipping 165 matching lines @@
   } else {
     ((CFWL_ListBox*)m_pNormalWidget)
         ->DeleteString(((CFWL_ListBox*)m_pNormalWidget)->GetItem(nIndex));
   }
   m_pNormalWidget->Update();
   AddInvalidateRect();
 }
 int32_t CXFA_FFListBox::OnProcessMessage(CFWL_Message* pMessage) {
   return m_pOldDelegate->OnProcessMessage(pMessage);
 }
-FWL_ERR CXFA_FFListBox::OnProcessEvent(CFWL_Event* pEvent) {
+FWL_Error CXFA_FFListBox::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
   switch (pEvent->GetClassID()) {
     case CFWL_EventType::SelectChanged: {
       CFX_Int32Array arrSels;
       OnSelectChanged(m_pNormalWidget->GetWidget(), arrSels);
       break;
     }
     default:
       break;
   }
   return m_pOldDelegate->OnProcessEvent(pEvent);
 }
-FWL_ERR CXFA_FFListBox::OnDrawWidget(CFX_Graphics* pGraphics,
-                                     const CFX_Matrix* pMatrix) {
+FWL_Error CXFA_FFListBox::OnDrawWidget(CFX_Graphics* pGraphics,
+                                       const CFX_Matrix* pMatrix) {
   return m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }
 
 CXFA_FFComboBox::CXFA_FFComboBox(CXFA_FFPageView* pPageView,
                                  CXFA_WidgetAcc* pDataAcc)
     : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(NULL) {}
 
 CXFA_FFComboBox::~CXFA_FFComboBox() {}
 
 FX_BOOL CXFA_FFComboBox::GetBBox(CFX_RectF& rtBox,
@@ skipping 281 matching lines @@
   CXFA_EventParam eParam;
   eParam.m_eType = XFA_EVENT_PostOpen;
   eParam.m_pTarget = m_pDataAcc;
   m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_PostOpen, &eParam);
 }
 
 int32_t CXFA_FFComboBox::OnProcessMessage(CFWL_Message* pMessage) {
   return m_pOldDelegate->OnProcessMessage(pMessage);
 }
 
-FWL_ERR CXFA_FFComboBox::OnProcessEvent(CFWL_Event* pEvent) {
+FWL_Error CXFA_FFComboBox::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
   switch (pEvent->GetClassID()) {
     case CFWL_EventType::SelectChanged: {
       CFWL_EvtCmbSelChanged* postEvent = (CFWL_EvtCmbSelChanged*)pEvent;
       OnSelectChanged(m_pNormalWidget->GetWidget(), postEvent->iArraySels,
                       postEvent->bLButtonUp);
       break;
     }
     case CFWL_EventType::EditChanged: {
       CFX_WideString wsChanged;
       OnTextChanged(m_pNormalWidget->GetWidget(), wsChanged);
       break;
     }
     case CFWL_EventType::PreDropDown: {
       OnPreOpen(m_pNormalWidget->GetWidget());
       break;
     }
     case CFWL_EventType::PostDropDown: {
       OnPostOpen(m_pNormalWidget->GetWidget());
       break;
     }
     default:
       break;
   }
   return m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
-FWL_ERR CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
-                                      const CFX_Matrix* pMatrix) {
+FWL_Error CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
+                                        const CFX_Matrix* pMatrix) {
   return m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }