Remove IXFA_Parser, cleanup XFA parser code.

xfa/fxfa/parser/xfa_layout_appadapter.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/parser/xfa_layout_appadapter.h"
 
 #include "xfa/fxfa/app/xfa_ffnotify.h"
 #include "xfa/fxfa/parser/xfa_doclayout.h"
 #include "xfa/fxfa/parser/xfa_document.h"
 #include "xfa/fxfa/parser/xfa_document_layout_imp.h"
 #include "xfa/fxfa/parser/xfa_layout_itemlayout.h"
 #include "xfa/fxfa/parser/xfa_layout_pagemgr_new.h"
 #include "xfa/fxfa/parser/xfa_localemgr.h"
 #include "xfa/fxfa/parser/xfa_object.h"
-#include "xfa/fxfa/parser/xfa_parser.h"
 #include "xfa/fxfa/parser/xfa_parser_imp.h"
 #include "xfa/fxfa/parser/xfa_script.h"
 #include "xfa/fxfa/parser/xfa_utils.h"
 
 void XFA_ReleaseLayoutItem(CXFA_LayoutItem* pLayoutItem) {
   CXFA_LayoutItem* pNode = pLayoutItem->m_pFirstChild;
-  CXFA_FFNotify* pNotify =
-      pLayoutItem->m_pFormNode->GetDocument()->GetParser()->GetNotify();
+  CXFA_FFNotify* pNotify = pLayoutItem->m_pFormNode->GetDocument()->GetNotify();
   CXFA_LayoutProcessor* pDocLayout =
       pLayoutItem->m_pFormNode->GetDocument()->GetDocLayout();
   while (pNode) {
     CXFA_LayoutItem* pNext = pNode->m_pNextSibling;
     pNode->m_pParent = nullptr;
     pNotify->OnLayoutItemRemoving(pDocLayout,
                                   static_cast<CXFA_LayoutItem*>(pNode));
     XFA_ReleaseLayoutItem(pNode);
     pNode = pNext;
   }
   pNotify->OnLayoutItemRemoving(pDocLayout, pLayoutItem);
   if (pLayoutItem->m_pFormNode->GetElementType() == XFA_Element::PageArea) {
     pNotify->OnPageEvent(static_cast<CXFA_ContainerLayoutItem*>(pLayoutItem),
                          XFA_PAGEVIEWEVENT_PostRemoved);
   }
   delete pLayoutItem;
 }