Move xfa/fwl/core to xfa/fwl.

xfa/fwl/core/cfwl_timerinfo.h

-// Copyright 2016 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
-
-#ifndef XFA_FWL_CORE_CFWL_TIMERINFO_H_
-#define XFA_FWL_CORE_CFWL_TIMERINFO_H_
-
-#include "core/fxcrt/fx_system.h"
-
-class IFWL_AdapterTimerMgr;
-
-class CFWL_TimerInfo {
- public:
-  explicit CFWL_TimerInfo(IFWL_AdapterTimerMgr* mgr) : m_pMgr(mgr) {
-    ASSERT(mgr);
-  }
-  virtual ~CFWL_TimerInfo() {}
-
-  void StopTimer();
-
- private:
-  IFWL_AdapterTimerMgr* m_pMgr;  // Not owned.
-};
-
-#endif  // XFA_FWL_CORE_CFWL_TIMERINFO_H_