Merge IFWL and CFWL classes.

xfa/fwl/core/cfwl_timer.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_timer.h"
 
 #include "xfa/fwl/core/cfwl_app.h"
 #include "xfa/fwl/core/cfwl_timerinfo.h"
+#include "xfa/fwl/core/cfwl_widget.h"
 #include "xfa/fwl/core/ifwl_adaptertimermgr.h"
-#include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 
 CFWL_TimerInfo* CFWL_Timer::StartTimer(uint32_t dwElapse, bool bImmediately) {
   const CFWL_App* pApp = m_pWidget->GetOwnerApp();
   if (!pApp)
     return nullptr;
 
   CXFA_FFApp* pAdapterNative = pApp->GetAdapterNative();
   if (!pAdapterNative)
     return nullptr;
 
   IFWL_AdapterTimerMgr* pAdapterTimerMgr = pAdapterNative->GetTimerMgr();
   if (!pAdapterTimerMgr)
     return nullptr;
 
   CFWL_TimerInfo* pTimerInfo = nullptr;
   pAdapterTimerMgr->Start(this, dwElapse, bImmediately, &pTimerInfo);
   return pTimerInfo;
 }