Remove FFI_ from CPDFSDK_Environment method names

fpdfsdk/formfiller/cffl_formfiller.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/formfiller/cffl_formfiller.h"
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fxge/include/cfx_renderdevice.h"
@@ skipping 547 matching lines @@
 
 void CFFL_FormFiller::SaveData(CPDFSDK_PageView* pPageView) {}
 
 #ifdef PDF_ENABLE_XFA
 FX_BOOL CFFL_FormFiller::IsFieldFull(CPDFSDK_PageView* pPageView) {
   return FALSE;
 }
 #endif  // PDF_ENABLE_XFA
 
 void CFFL_FormFiller::SetChangeMark() {
-  m_pApp->FFI_OnChange();
+  m_pApp->OnChange();
 }
 
 void CFFL_FormFiller::GetActionData(CPDFSDK_PageView* pPageView,
                                     CPDF_AAction::AActionType type,
                                     PDFSDK_FieldAction& fa) {
   fa.sValue = m_pWidget->GetValue();
 }
 
 void CFFL_FormFiller::SetActionData(CPDFSDK_PageView* pPageView,
                                     CPDF_AAction::AActionType type,
@@ skipping 29 matching lines @@
 
   if (bDestroyPDFWindow)
     DestroyPDFWindow(pPageView);
 }
 
 void CFFL_FormFiller::InvalidateRect(double left,
                                      double top,
                                      double right,
                                      double bottom) {
   UnderlyingPageType* pPage = m_pWidget->GetUnderlyingPage();
-  m_pApp->FFI_Invalidate(pPage, left, top, right, bottom);
+  m_pApp->Invalidate(pPage, left, top, right, bottom);
 }
 
 CFFL_Button::CFFL_Button(CPDFSDK_Environment* pApp, CPDFSDK_Annot* pWidget)
     : CFFL_FormFiller(pApp, pWidget), m_bMouseIn(FALSE), m_bMouseDown(FALSE) {}
 
 CFFL_Button::~CFFL_Button() {}
 
 void CFFL_Button::OnMouseEnter(CPDFSDK_PageView* pPageView,
                                CPDFSDK_Annot* pAnnot) {
   m_bMouseIn = TRUE;
@@ skipping 82 matching lines @@
     pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
   }
 }
 
 void CFFL_Button::OnDrawDeactive(CPDFSDK_PageView* pPageView,
                                  CPDFSDK_Annot* pAnnot,
                                  CFX_RenderDevice* pDevice,
                                  CFX_Matrix* pUser2Device) {
   OnDraw(pPageView, pAnnot, pDevice, pUser2Device);
 }