Rename fpdfsdk/fpdfxfa files to match contents

fpdfsdk/fpdfxfa/fpdfxfa_util.h

-// 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
-
-#ifndef FPDFSDK_FPDFXFA_FPDFXFA_UTIL_H_
-#define FPDFSDK_FPDFXFA_FPDFXFA_UTIL_H_
-
-#include <vector>
-
-#include "fpdfsdk/fpdfxfa/fpdfxfa_doc.h"
-#include "xfa/fwl/core/ifwl_adaptertimermgr.h"
-
-#define JS_STR_VIEWERTYPE_STANDARD L"Exchange"
-#define JS_STR_LANGUANGE L"ENU"
-#define JS_STR_VIEWERVARIATION L"Full"
-#define JS_STR_VIEWERVERSION_XFA L"11"
-
-struct CFWL_TimerInfo;
-
-class CXFA_FWLAdapterTimerMgr : public IFWL_AdapterTimerMgr {
- public:
-  CXFA_FWLAdapterTimerMgr(CPDFSDK_Environment* pEnv) : m_pEnv(pEnv) {}
-
-  FWL_Error Start(IFWL_Timer* pTimer,
-                  uint32_t dwElapse,
-                  bool bImmediately,
-                  IFWL_TimerInfo** pTimerInfo) override;
-  FWL_Error Stop(IFWL_TimerInfo* pTimerInfo) override;
-
- protected:
-  static void TimerProc(int32_t idEvent);
-
-  static std::vector<CFWL_TimerInfo*>* s_TimerArray;
-  CPDFSDK_Environment* const m_pEnv;
-};
-
-struct CFWL_TimerInfo : public IFWL_TimerInfo {
-  CFWL_TimerInfo() : pTimer(nullptr) {}
-  CFWL_TimerInfo(int32_t event, IFWL_Timer* timer)
-      : idEvent(event), pTimer(timer) {}
-
-  int32_t idEvent;
-  IFWL_Timer* pTimer;
-};
-
-#endif  // FPDFSDK_FPDFXFA_FPDFXFA_UTIL_H_