Remove IWFL_WidgetMgr in favor of CFWL_WidgetMgr

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"
@@ skipping 14 matching lines @@
 }
 
 FWL_Error IFWL_App::Finalize() {
   return static_cast<CFWL_AppImp*>(GetImpl())->Finalize();
 }
 
 CXFA_FFApp* IFWL_App::GetAdapterNative() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetAdapterNative();
 }
 
-IFWL_WidgetMgr* IFWL_App::GetWidgetMgr() {
+CFWL_WidgetMgr* IFWL_App::GetWidgetMgr() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetWidgetMgr();
 }
 
 IFWL_ThemeProvider* IFWL_App::GetThemeProvider() {
   return static_cast<CFWL_AppImp*>(GetImpl())->GetThemeProvider();
 }
 
 void IFWL_App::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   static_cast<CFWL_AppImp*>(GetImpl())->SetThemeProvider(pThemeProvider);
 }
@@ skipping 23 matching lines @@
   return FWL_Error::Succeeded;
 }
 FWL_Error CFWL_AppImp::Finalize() {
   m_pWidgetMgr.reset();
   return FWL_Error::Succeeded;
 }
 CXFA_FFApp* CFWL_AppImp::GetAdapterNative() const {
   return m_pAdapterNative;
 }
 CXFA_FWLAdapterWidgetMgr* FWL_GetAdapterWidgetMgr() {
-  return static_cast<CFWL_WidgetMgr*>(FWL_GetWidgetMgr())
-      ->GetAdapterWidgetMgr();
+  return CFWL_WidgetMgr::GetInstance()->GetAdapterWidgetMgr();
 }
-IFWL_WidgetMgr* CFWL_AppImp::GetWidgetMgr() const {
+CFWL_WidgetMgr* CFWL_AppImp::GetWidgetMgr() const {
   return m_pWidgetMgr.get();
 }
 
 void CFWL_AppImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   m_pThemeProvider = pThemeProvider;
 }
 
 void CFWL_AppImp::Exit(int32_t iExitCode) {
   while (m_pNoteDriver->PopNoteLoop()) {
     continue;
@@ skipping 12 matching lines @@
 }
 
 static IFWL_App* g_theApp = nullptr;
 IFWL_App* FWL_GetApp() {
   return g_theApp;
 }
 
 void FWL_SetApp(IFWL_App* pApp) {
   g_theApp = pApp;
 }