Fix a few more warnings in chromium_code mode.

core/src/fpdfapi/fpdf_font/fpdf_font_utility.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 "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_resource.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "font_int.h"
 #ifndef _FPDFAPI_MINI_
 typedef struct {
     FXSYS_FILE* m_pFile;
     int         m_nFiles;
     int         m_IndexSize;
     int         m_IndexOffset;
 } FXFC_PACKAGE;
 FX_LPVOID FXFC_LoadPackage(FX_LPCSTR name)
 {
     FXSYS_FILE* file = FXSYS_fopen(name, (FX_LPCSTR)"rb");
     if (file == NULL) {
         return NULL;
     }
     FX_BYTE buf[256];
-    size_t read = FXSYS_fread(buf, 1, 20, file);
+    FXSYS_fread(buf, 1, 20, file);
     if (*(FX_DWORD*)buf != 0x43465846) {
         FXSYS_fclose(file);
         return NULL;
     }
     FXFC_PACKAGE* pPackage = FX_Alloc(FXFC_PACKAGE, 1);
     pPackage->m_pFile = file;
     pPackage->m_nFiles = *(int*)(buf + 8);
     pPackage->m_IndexSize = *(int*)(buf + 12);
     pPackage->m_IndexOffset = *(int*)(buf + 16);
     return pPackage;
 }
 void FXFC_ClosePackage(FX_LPVOID p)
 {
     FXFC_PACKAGE* pPackage = (FXFC_PACKAGE*)p;
     FXSYS_fclose(pPackage->m_pFile);
     FX_Free(pPackage);
 }
 FX_BOOL FXFC_LoadFile(FX_LPVOID p, FX_LPCSTR name, FX_LPBYTE& pBuffer, FX_DWORD& size)
 {
     FXFC_PACKAGE* pPackage = (FXFC_PACKAGE*)p;
     FXSYS_fseek(pPackage->m_pFile, pPackage->m_IndexOffset, FXSYS_SEEK_SET);
     FX_BYTE buf[128];
-    size_t read = 0;
     for (int i = 0; i < pPackage->m_nFiles; i ++) {
-        read = FXSYS_fread(buf, pPackage->m_IndexSize, 1, pPackage->m_pFile);
+        FXSYS_fread(buf, pPackage->m_IndexSize, 1, pPackage->m_pFile);
         if (FXSYS_stricmp((FX_LPCSTR)buf, name) == 0) {
             FX_DWORD offset = *(FX_DWORD*)&buf[64];
             size = *(FX_DWORD*)&buf[68];
             pBuffer = FX_Alloc(FX_BYTE, size);
             FXSYS_fseek(pPackage->m_pFile, offset, FXSYS_SEEK_SET);
-            read = FXSYS_fread(pBuffer, size, 1, pPackage->m_pFile);
+            FXSYS_fread(pBuffer, size, 1, pPackage->m_pFile);
             if (buf[72]) {
                 FX_DWORD orig_size;
                 FX_LPBYTE comp_buf = pBuffer;
                 CPDF_ModuleMgr::Get()->GetFlateModule()->FlateOrLZWDecode(FALSE, comp_buf, size, FALSE,
                         0, 0, 0, 0, 0, pBuffer, orig_size);
                 FX_Free(comp_buf);
                 size = orig_size;
             }
             return TRUE;
         }
@@ skipping 21 matching lines @@
 {
     if (m_pTable == NULL) {
         return NULL;
     }
     if ((int)index < (int)m_pHeader->dwStartIndex || index > m_pHeader->dwEndIndex) {
         return NULL;
     }
     return m_pTable + (index - m_pHeader->dwStartIndex) * m_pHeader->dwRecordSize;
 }
 #endif