Fix emoji font fallback logic on Windows

Source/platform/fonts/win/FontFallbackWin.cpp

 /*
  * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 268 matching lines @@
     // infer a script based on the unicode block of a character.
     if (script <= USCRIPT_INHERITED || U_FAILURE(err))
         script = getScriptBasedOnUnicodeBlock(ucs4);
     return script;
 }
 
 const UChar* getFontBasedOnUnicodeBlock(int ucs4, SkFontMgr* fontManager)
 {
     static const UChar* emojiFonts[] = {L"Segoe UI Emoji", L"Segoe UI Symbol"};
     static const UChar* symbolFont = L"Segoe UI Symbol";
-    const UChar* emojiFont = 0;
+    static const UChar* emojiFont = 0;
     static bool initialized = false;
     if (!initialized) {
         for (size_t i = 0; i < WTF_ARRAY_LENGTH(emojiFonts); i++) {
             if (isFontPresent(emojiFonts[i], fontManager)) {
                 emojiFont = emojiFonts[i];
                 break;
             }
         }
         initialized = true;
     }
@@ skipping 111 matching lines @@
             family = L"lucida sans unicode";
         }
     }
 
     if (scriptChecked)
         *scriptChecked = script;
     return family;
 }
 
 } // namespace blink