Split CPDFXFA_Document apart

xfa/fxfa/app/xfa_fwladapter.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 "xfa/fxfa/app/xfa_fwladapter.h"
 
 #include "xfa/fxfa/app/xfa_fffield.h"
 #include "xfa/fxfa/include/xfa_ffdoc.h"
@@ skipping 20 matching lines @@
                                               FX_FLOAT fMinHeight,
                                               FX_FLOAT fMaxHeight,
                                               const CFX_RectF& rtAnchor,
                                               CFX_RectF& rtPopup) {
   CXFA_FFWidget* pFFWidget =
       static_cast<CXFA_FFWidget*>(pWidget->GetLayoutItem());
   CFX_Matrix mt;
   pFFWidget->GetRotateMatrix(mt);
   CFX_RectF rtRotateAnchor(rtAnchor);
   mt.TransformRect(rtRotateAnchor);
-  pFFWidget->GetDoc()->GetDocProvider()->GetPopupPos(
+  pFFWidget->GetDoc()->GetDocEnvironment()->GetPopupPos(
       pFFWidget, fMinHeight, fMaxHeight, rtRotateAnchor, rtPopup);
   return TRUE;
 }