Remove FFI_ from CPDFSDK_Environment method names

fpdfsdk/fpdfxfa/fpdfxfa_util.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 "fpdfsdk/fpdfxfa/include/fpdfxfa_util.h"
 
 #include <vector>
 
 #include "fpdfsdk/include/cpdfsdk_environment.h"
 #include "fpdfsdk/include/fsdk_define.h"
 
 std::vector<CFWL_TimerInfo*>* CXFA_FWLAdapterTimerMgr::s_TimerArray = nullptr;
 
 FWL_Error CXFA_FWLAdapterTimerMgr::Start(IFWL_Timer* pTimer,
                                          uint32_t dwElapse,
                                          bool bImmediately,
                                          IFWL_TimerInfo** pTimerInfo) {
   if (!m_pEnv)
     return FWL_Error::Indefinite;
 
-  int32_t id_event = m_pEnv->FFI_SetTimer(dwElapse, TimerProc);
+  int32_t id_event = m_pEnv->SetTimer(dwElapse, TimerProc);
   if (!s_TimerArray)
     s_TimerArray = new std::vector<CFWL_TimerInfo*>;
 
   s_TimerArray->push_back(new CFWL_TimerInfo(id_event, pTimer));
   *pTimerInfo = s_TimerArray->back();
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CXFA_FWLAdapterTimerMgr::Stop(IFWL_TimerInfo* pTimerInfo) {
   if (!pTimerInfo || !m_pEnv)
     return FWL_Error::Indefinite;
 
   CFWL_TimerInfo* pInfo = static_cast<CFWL_TimerInfo*>(pTimerInfo);
-  m_pEnv->FFI_KillTimer(pInfo->idEvent);
+  m_pEnv->KillTimer(pInfo->idEvent);
   if (s_TimerArray) {
     auto it = std::find(s_TimerArray->begin(), s_TimerArray->end(), pInfo);
     if (it != s_TimerArray->end()) {
       s_TimerArray->erase(it);
       delete pInfo;
     }
   }
   return FWL_Error::Succeeded;
 }
 
 // static
 void CXFA_FWLAdapterTimerMgr::TimerProc(int32_t idEvent) {
   if (!s_TimerArray)
     return;
 
   for (CFWL_TimerInfo* pInfo : *s_TimerArray) {
     if (pInfo->idEvent == idEvent) {
       pInfo->pTimer->Run(pInfo);
       break;
     }
   }
 }