Use stdint.h types throughout PDFium.

core/src/fpdfapi/fpdf_page/fpdf_page_parser.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_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_serial.h"
 #include "pageint.h"
@@ skipping 1535 matching lines @@
     }
 }
 CFX_ByteString _FPDF_ByteStringFromHex(CFX_BinaryBuf& src_buf)
 {
     CFX_ByteTextBuf buf;
     FX_BOOL bFirst = TRUE;
     int code = 0;
     FX_LPCBYTE str = src_buf.GetBuffer();
     FX_DWORD size = src_buf.GetSize();
     for (FX_DWORD i = 0; i < size; i ++) {
-        FX_BYTE ch = str[i];
+        uint8_t ch = str[i];
         if (ch >= '0' && ch <= '9') {
             if (bFirst) {
                 code = (ch - '0') * 16;
             } else {
                 code += ch - '0';
                 buf.AppendChar((char)code);
             }
             bFirst = !bFirst;
         } else if (ch >= 'A' && ch <= 'F') {
             if (bFirst) {
@@ skipping 11 matching lines @@
                 buf.AppendChar((char)code);
             }
             bFirst = !bFirst;
         }
     }
     if (!bFirst) {
         buf.AppendChar((char)code);
     }
     return buf.GetByteString();
 }