Make code compile with clang_use_chrome_plugin (part V)

xfa/fxfa/fm2js/xfa_fmparse.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/fm2js/xfa_fmparse.h"
 
 #include <memory>
 
 CXFA_FMParse::CXFA_FMParse() : m_pToken(nullptr), m_pErrorInfo(0) {}
 
+CXFA_FMParse::~CXFA_FMParse() {}
+
 int32_t CXFA_FMParse::Init(const CFX_WideStringC& wsFormcalc,
                            CXFA_FMErrorInfo* pErrorInfo) {
   m_pErrorInfo = pErrorInfo;
   m_lexer.reset(new CXFA_FMLexer(wsFormcalc, m_pErrorInfo));
   return 0;
 }
 
 void CXFA_FMParse::NextToken() {
   m_pToken = m_lexer->NextToken();
   while (m_pToken->m_type == TOKreserver) {
@@ skipping 1017 matching lines @@
   NextToken();
   e.reset(ParseBlockExpression());
   Check(TOKend);
   if (m_pErrorInfo->message.IsEmpty()) {
     e.reset(new CXFA_FMDoExpression(line, e.release()));
   } else {
     e.reset();
   }
   return e.release();
 }