Convert FWL_ERR into an enum class.

xfa/fwl/core/fwl_appimp.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/fwl_appimp.h"
 
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/fwl_widgetmgrimp.h"
 #include "xfa/fwl/core/ifwl_adapterwidgetmgr.h"
 #include "xfa/fwl/core/ifwl_app.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 IFWL_App* IFWL_App::Create(IFWL_AdapterNative* pAdapter) {
   IFWL_App* pApp = new IFWL_App;
   pApp->SetImpl(new CFWL_AppImp(pApp, pAdapter));
   return pApp;
 }
 
 void IFWL_App::Release() {}
 
-FWL_ERR IFWL_App::Initialize() {
+FWL_Error IFWL_App::Initialize() {
   return static_cast<CFWL_AppImp*>(GetImpl())->Initialize();
 }
 
-FWL_ERR IFWL_App::Finalize() {
+FWL_Error IFWL_App::Finalize() {
   return static_cast<CFWL_AppImp*>(GetImpl())->Finalize();
 }
 
 IFWL_AdapterNative* IFWL_App::GetAdapterNative() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetAdapterNative();
 }
 
 IFWL_WidgetMgr* IFWL_App::GetWidgetMgr() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetWidgetMgr();
 }
 
 IFWL_ThemeProvider* IFWL_App::GetThemeProvider() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetThemeProvider();
 }
 
-FWL_ERR IFWL_App::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
+FWL_Error IFWL_App::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   return static_cast<CFWL_AppImp*>(GetImpl())->SetThemeProvider(pThemeProvider);
 }
 
-FWL_ERR IFWL_App::Exit(int32_t iExitCode) {
+FWL_Error IFWL_App::Exit(int32_t iExitCode) {
   return static_cast<CFWL_AppImp*>(GetImpl())->Exit(iExitCode);
 }
 
 CFWL_NoteDriver* IFWL_App::GetNoteDriver() const {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetNoteDriver();
 }
 
 CFWL_AppImp::CFWL_AppImp(IFWL_App* pIface, IFWL_AdapterNative* pAdapter)
     : m_pAdapterNative(pAdapter),
       m_pThemeProvider(nullptr),
       m_pNoteDriver(new CFWL_NoteDriver),
       m_pIface(pIface) {}
 
 CFWL_AppImp::~CFWL_AppImp() {
   CFWL_ToolTipContainer::DeleteInstance();
 }
 
-FWL_ERR CFWL_AppImp::Initialize() {
+FWL_Error CFWL_AppImp::Initialize() {
   if (!m_pWidgetMgr) {
     m_pWidgetMgr.reset(new CFWL_WidgetMgr(m_pAdapterNative));
   }
-  return FWL_ERR_Succeeded;
+  return FWL_Error::Succeeded;
 }
-FWL_ERR CFWL_AppImp::Finalize() {
+FWL_Error CFWL_AppImp::Finalize() {
   m_pWidgetMgr.reset();
-  return FWL_ERR_Succeeded;
+  return FWL_Error::Succeeded;
 }
 IFWL_AdapterNative* CFWL_AppImp::GetAdapterNative() const {
   return m_pAdapterNative;
 }
 IFWL_AdapterWidgetMgr* FWL_GetAdapterWidgetMgr() {
   return static_cast<CFWL_WidgetMgr*>(FWL_GetWidgetMgr())
       ->GetAdapterWidgetMgr();
 }
 IFWL_WidgetMgr* CFWL_AppImp::GetWidgetMgr() const {
   return m_pWidgetMgr.get();
 }
-FWL_ERR CFWL_AppImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
+FWL_Error CFWL_AppImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   m_pThemeProvider = pThemeProvider;
-  return FWL_ERR_Succeeded;
+  return FWL_Error::Succeeded;
 }
-FWL_ERR CFWL_AppImp::Exit(int32_t iExitCode) {
+FWL_Error CFWL_AppImp::Exit(int32_t iExitCode) {
   while (m_pNoteDriver->PopNoteLoop()) {
     continue;
   }
   return m_pWidgetMgr->GetAdapterWidgetMgr()->Exit(0);
 }
 IFWL_ThemeProvider* CFWL_AppImp::GetThemeProvider() const {
   return m_pThemeProvider;
 }
 IFWL_AdapterNative* FWL_GetAdapterNative() {
   IFWL_App* pApp = FWL_GetApp();
   if (!pApp)
     return NULL;
   return pApp->GetAdapterNative();
 }
 static IFWL_App* _theApp = NULL;
 IFWL_App* FWL_GetApp() {
   return _theApp;
 }
 void FWL_SetApp(IFWL_App* pApp) {
   _theApp = pApp;
 }