Remove foxitlib.h and foxitxfa.h and IWYU.

xfa/src/fxfa/src/app/xfa_ffdocview.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/src/foxitlib.h"
+#include "xfa/src/fxfa/src/app/xfa_ffdocview.h"
+
+#include "core/include/fxcrt/fx_ext.h"
 #include "xfa/src/fxfa/src/app/xfa_ffapp.h"
 #include "xfa/src/fxfa/src/app/xfa_ffbarcode.h"
 #include "xfa/src/fxfa/src/app/xfa_ffcheckbutton.h"
 #include "xfa/src/fxfa/src/app/xfa_ffchoicelist.h"
 #include "xfa/src/fxfa/src/app/xfa_ffdoc.h"
-#include "xfa/src/fxfa/src/app/xfa_ffdocview.h"
 #include "xfa/src/fxfa/src/app/xfa_ffdraw.h"
 #include "xfa/src/fxfa/src/app/xfa_ffexclgroup.h"
 #include "xfa/src/fxfa/src/app/xfa_fffield.h"
 #include "xfa/src/fxfa/src/app/xfa_ffimage.h"
 #include "xfa/src/fxfa/src/app/xfa_ffimageedit.h"
 #include "xfa/src/fxfa/src/app/xfa_ffpageview.h"
 #include "xfa/src/fxfa/src/app/xfa_ffpath.h"
 #include "xfa/src/fxfa/src/app/xfa_ffpushbutton.h"
 #include "xfa/src/fxfa/src/app/xfa_ffsignature.h"
 #include "xfa/src/fxfa/src/app/xfa_ffsubform.h"
@@ skipping 899 matching lines @@
 CXFA_WidgetAcc* CXFA_WidgetAccIterator::GetCurrentWidgetAcc() {
   return NULL;
 }
 FX_BOOL CXFA_WidgetAccIterator::SetCurrentWidgetAcc(CXFA_WidgetAcc* hWidget) {
   return FALSE;
 }
 void CXFA_WidgetAccIterator::SkipTree() {
   m_ContentIterator.SkipChildrenAndMoveToNext();
   m_pCurWidgetAcc = NULL;
 }