Fix Windows GN build warning.

core/fxge/ge/fx_ge_fontmap.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 <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 726 matching lines @@
   uint32_t bytes_read =
       m_pFontInfo->GetFontData(hFont, kTableNAME, buffer_ptr, size);
   return bytes_read == size ? GetNameFromTT(buffer_ptr, bytes_read, 6)
                             : CFX_ByteString();
 }
 
 void CFX_FontMapper::AddInstalledFont(const CFX_ByteString& name, int charset) {
   if (!m_pFontInfo)
     return;
 
-  m_FaceArray.push_back({name, static_cast<uint32_t>(charset)});
+  m_FaceArray.push_back({name, charset});
   if (name == m_LastFamily)
     return;
 
   const uint8_t* ptr = name.raw_str();
   FX_BOOL bLocalized = FALSE;
   for (int i = 0; i < name.GetLength(); i++) {
     if (ptr[i] > 0x80) {
       bLocalized = TRUE;
       break;
     }
@@ skipping 884 matching lines @@
 int PDF_GetStandardFontName(CFX_ByteString* name) {
   AltFontName* found = static_cast<AltFontName*>(
       FXSYS_bsearch(name->c_str(), g_AltFontNames, FX_ArraySize(g_AltFontNames),
                     sizeof(AltFontName), CompareString));
   if (!found)
     return -1;
 
   *name = g_Base14FontNames[found->m_Index];
   return found->m_Index;
 }