Fix the Windows build after commit 8a9ce57.

core/src/fxcodec/jbig2/JBig2_Context.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 "JBig2_Context.h"
 
 #include <list>
 
@@ skipping 1275 matching lines @@
       m_pStream->readInteger((FX_DWORD*)&pRI->y) != 0 ||
       m_pStream->read1Byte(&pRI->flags) != 0) {
     return JBIG2_ERROR_TOO_SHORT;
   }
   return JBIG2_SUCCESS;
 }
 
 JBig2HuffmanCode* CJBig2_Context::decodeSymbolIDHuffmanTable(
     CJBig2_BitStream* pStream,
     FX_DWORD SBNUMSYMS) {
-  size_t kRunCodesSize = 35;
+  const size_t kRunCodesSize = 35;
   int32_t runcodes[kRunCodesSize];
   int32_t runcodes_len[kRunCodesSize];
   for (int32_t i = 0; i < kRunCodesSize; ++i) {
     if (pStream->readNBits(4, &runcodes_len[i]) != 0)
       return nullptr;
   }
   huffman_assign_code(runcodes, runcodes_len, kRunCodesSize);
 
   nonstd::unique_ptr<JBig2HuffmanCode, FxFreeDeleter> SBSYMCODES(
       FX_Alloc(JBig2HuffmanCode, SBNUMSYMS));
@@ skipping 120 matching lines @@
         SBSYMCODES[CURTEMP].code = CURCODE;
         CURCODE = CURCODE + 1;
       }
       CURTEMP = CURTEMP + 1;
     }
     CURLEN = CURLEN + 1;
   }
   FX_Free(LENCOUNT);
   FX_Free(FIRSTCODE);
 }