Remove no-op ShowFileDialog(s).

fpdfsdk/fpdfxfa/fpdfxfa_app.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 "fpdfsdk/fpdfxfa/include/fpdfxfa_app.h"
 #include "fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h"
 #include "fpdfsdk/fpdfxfa/include/fpdfxfa_util.h"
 #include "fpdfsdk/include/fsdk_define.h"
@@ skipping 496 matching lines @@
       wsString = FX_WSTRC(
           L"The value you entered for %s is invalid. To ignore validations for "
           L"%s, click Ignore.");
       return;
     case XFA_IDS_ValidateError:
       wsString = FX_WSTRC(L"The value you entered for %s is invalid.");
       return;
   }
 }
 
-FX_BOOL CPDFXFA_App::ShowFileDialog(const CFX_WideStringC& wsTitle,
-                                    const CFX_WideStringC& wsFilter,
-                                    CFX_WideStringArray& wsPathArr,
-                                    FX_BOOL bOpen) {
-  return FALSE;
-}
-
 IFWL_AdapterTimerMgr* CPDFXFA_App::GetTimerMgr() {
   CXFA_FWLAdapterTimerMgr* pAdapter = NULL;
   CPDFDoc_Environment* pEnv = m_pEnvList.GetAt(0);
   if (pEnv)
     pAdapter = new CXFA_FWLAdapterTimerMgr(pEnv);
   return pAdapter;
 }