Remove FFI_ from CPDFSDK_Environment method names

fpdfsdk/javascript/Field.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/javascript/Field.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 3186 matching lines @@
   if (nCount < 1)
     return FALSE;
 
   CPDFSDK_InterForm* pInterForm = m_pDocument->GetInterForm();
   CPDFSDK_Widget* pWidget = nullptr;
   if (nCount == 1) {
     pWidget = pInterForm->GetWidget(pFormField->GetControl(0), false);
   } else {
     CPDFSDK_Environment* pEnv = m_pDocument->GetEnv();
     UnderlyingPageType* pPage = UnderlyingFromFPDFPage(
-        pEnv->FFI_GetCurrentPage(m_pDocument->GetUnderlyingDocument()));
+        pEnv->GetCurrentPage(m_pDocument->GetUnderlyingDocument()));
     if (!pPage)
       return FALSE;
     if (CPDFSDK_PageView* pCurPageView =
             m_pDocument->GetPageView(pPage, true)) {
       for (int32_t i = 0; i < nCount; i++) {
         if (CPDFSDK_Widget* pTempWidget =
                 pInterForm->GetWidget(pFormField->GetControl(i), false)) {
           if (pTempWidget->GetPDFPage() == pCurPageView->GetPDFPage()) {
             pWidget = pTempWidget;
             break;
@@ skipping 273 matching lines @@
   }
 }
 
 void Field::AddField(CPDFSDK_Document* pDocument,
                      int nPageIndex,
                      int nFieldType,
                      const CFX_WideString& sName,
                      const CFX_FloatRect& rcCoords) {
   // Not supported.
 }