Convert CPDFSDK_InterForm to take a CPDFSDK_FormFillEnvironment

fpdfsdk/cpdfsdk_document.cpp

 // 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
 
 #include "fpdfsdk/cpdfsdk_document.h"
 
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
@@ skipping 144 matching lines @@
 
   delete pPageView;
 }
 
 UnderlyingPageType* CPDFSDK_Document::GetPage(int nIndex) {
   return UnderlyingFromFPDFPage(m_pEnv->GetPage(m_pDoc, nIndex));
 }
 
 CPDFSDK_InterForm* CPDFSDK_Document::GetInterForm() {
   if (!m_pInterForm)
-    m_pInterForm = pdfium::MakeUnique<CPDFSDK_InterForm>(this);
+    m_pInterForm = pdfium::MakeUnique<CPDFSDK_InterForm>(GetEnv());
   return m_pInterForm.get();
 }
 
 void CPDFSDK_Document::UpdateAllViews(CPDFSDK_PageView* pSender,
                                       CPDFSDK_Annot* pAnnot) {
   for (const auto& it : m_pageMap) {
     CPDFSDK_PageView* pPageView = it.second;
     if (pPageView != pSender)
       pPageView->UpdateView(pAnnot);
   }
@@ skipping 70 matching lines @@
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }
 
 IJS_Runtime* CPDFSDK_Document::GetJsRuntime() {
   return m_pEnv->GetJSRuntime();
 }
 
 CFX_WideString CPDFSDK_Document::GetPath() {
   return m_pEnv->JS_docGetFilePath();
 }