Move CPDFSDK_Environment code to cpp file

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/include/cpdfsdk_document.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
@@ skipping 213 matching lines @@
     if (!pAnnotHandler->Annot_OnChangeFocus(nullptr, pFocusAnnot))
       return FALSE;
 #endif  // PDF_ENABLE_XFA
 
     if (pAnnotHandler->Annot_OnKillFocus(pFocusAnnot, nFlag)) {
       if (pFocusAnnot->GetAnnotSubtype() == CPDF_Annot::Subtype::WIDGET) {
         CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pFocusAnnot;
         int nFieldType = pWidget->GetFieldType();
         if (FIELDTYPE_TEXTFIELD == nFieldType ||
             FIELDTYPE_COMBOBOX == nFieldType) {
-          m_pEnv->OnSetFieldInputFocus(nullptr, nullptr, 0, FALSE);
+          m_pEnv->OnSetFieldInputFocus(nullptr, 0, FALSE);
         }
       }
 
       if (!m_pFocusAnnot)
         return TRUE;
     } else {
       m_pFocusAnnot = pFocusAnnot;
     }
   }
   return FALSE;
 }
 
 void CPDFSDK_Document::OnCloseDocument() {
   KillFocusAnnot();
 }
 
 FX_BOOL CPDFSDK_Document::GetPermissions(int nFlag) {
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }
 
 IJS_Runtime* CPDFSDK_Document::GetJsRuntime() {
   return m_pEnv->GetJSRuntime();
 }
 
 CFX_WideString CPDFSDK_Document::GetPath() {
   return m_pEnv->JS_docGetFilePath();
 }