Move xfa/fwl/core to xfa/fwl.

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/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;
-}