Review and cleanup lint warnings.

core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.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 "core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h"
 
+#include <vector>
+
 #include "core/include/fxcrt/fx_basic.h"
 
 namespace {
 
 int ShiftOr(int val, int bitwise_or_val) {
   return (val << 1) | bitwise_or_val;
 }
 
 const struct ArithIntDecodeData {
   int nNeedBits;
@@ skipping 69 matching lines @@
 void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
                                      FX_DWORD* nResult) {
   int PREV = 1;
   for (unsigned char i = 0; i < SBSYMCODELEN; ++i) {
     JBig2ArithCtx* pCX = &m_IAID[PREV];
     int D = pArithDecoder->DECODE(pCX);
     PREV = ShiftOr(PREV, D);
   }
   *nResult = PREV - (1 << SBSYMCODELEN);
 }