Make code compile with clang_use_chrome_plugin (part V)

xfa/fxfa/fm2js/xfa_lexer.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_lexer.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 
@@ skipping 149 matching lines @@
 
 CXFA_FMToken::CXFA_FMToken() : m_type(TOKreserver), m_uLinenum(1) {}
 
 CXFA_FMToken::CXFA_FMToken(uint32_t uLineNum)
     : m_type(TOKreserver), m_uLinenum(uLineNum) {}
 
 CXFA_FMLexer::CXFA_FMLexer(const CFX_WideStringC& wsFormCalc,
                            CXFA_FMErrorInfo* pErrorInfo)
     : m_ptr(wsFormCalc.c_str()), m_uCurrentLine(1), m_pErrorInfo(pErrorInfo) {}
 
+CXFA_FMLexer::~CXFA_FMLexer() {}
+
 CXFA_FMToken* CXFA_FMLexer::NextToken() {
   m_pToken.reset(Scan());
   return m_pToken.get();
 }
 
 CXFA_FMToken* CXFA_FMLexer::Scan() {
   uint16_t ch = 0;
   CXFA_FMToken* p = new CXFA_FMToken(m_uCurrentLine);
   if (!XFA_FMDChar::isAvalid(m_ptr)) {
     ch = XFA_FMDChar::get(m_ptr);
@@ skipping 359 matching lines @@
   m_pErrorInfo->message.FormatV(msg, ap);
   va_end(ap);
 }
 
 FX_BOOL CXFA_FMLexer::HasError() const {
   if (m_pErrorInfo->message.IsEmpty()) {
     return FALSE;
   }
   return TRUE;
 }