In linux and mac, use Arial to replace Tahoma for displaying east europe characters

fpdfsdk/src/pdfwindow/PWL_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 "../../include/pdfwindow/PDFWindow.h"
 #include "../../include/pdfwindow/PWL_Wnd.h"
 #include "../../include/pdfwindow/PWL_FontMap.h"
 
@@ skipping 490 matching lines @@
         return nCharset;
 }
 
 const CPWL_FontMap::CharsetFontMap CPWL_FontMap::defaultTTFMap[] = {
         { ANSI_CHARSET, "Helvetica" },
         { GB2312_CHARSET, "SimSun" },
         { CHINESEBIG5_CHARSET, "MingLiU" },
         { SHIFTJIS_CHARSET, "MS Gothic" },
         { HANGUL_CHARSET, "Batang" },
         { RUSSIAN_CHARSET, "Arial" },
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+        { EASTEUROPE_CHARSET, "Arial" },
+#else
         { EASTEUROPE_CHARSET, "Tahoma" },
+#endif
         { ARABIC_CHARSET, "Arial" },
         { -1, NULL }
 };
 
 CFX_ByteString CPWL_FontMap::GetDefaultFontByCharset(FX_INT32 nCharset)
 {
         int i = 0;
         while (defaultTTFMap[i].charset != -1) {
                 if (nCharset == defaultTTFMap[i].charset)
                         return defaultTTFMap[i].fontname;
@@ skipping 70 matching lines @@
 }
 
 CPWL_DocFontMap::~CPWL_DocFontMap()
 {
 }
 
 CPDF_Document* CPWL_DocFontMap::GetDocument()
 {
         return m_pAttachedDoc;
 }