Add LayoutLocale class

third_party/WebKit/Source/platform/fonts/linux/FontCacheLinux.cpp

 /*
  * Copyright (C) 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 87 matching lines @@
     if (fallbackPriority != FontFallbackPriority::EmojiEmoji
         && (fontDescription.style() == FontStyleItalic
         || fontDescription.weight() >= FontWeight600)) {
         RefPtr<SimpleFontData> fontData = fallbackOnStandardFontStyle(
             fontDescription, c);
         if (fontData)
             return fontData;
     }
 
     FontCache::PlatformFallbackFont fallbackFont;
-    FontCache::getFontForCharacter(c, fontDescription.locale().ascii().data(), &fallbackFont);
+    FontCache::getFontForCharacter(c, fontDescription.localeOrDefault().ascii().data(), &fallbackFont);
     if (fallbackFont.name.isEmpty())
         return nullptr;
 
     FontFaceCreationParams creationParams;
     creationParams = FontFaceCreationParams(fallbackFont.filename, fallbackFont.fontconfigInterfaceId, fallbackFont.ttcIndex);
 
     // Changes weight and/or italic of given FontDescription depends on
     // the result of fontconfig so that keeping the correct font mapping
     // of the given character. See http://crbug.com/32109 for details.
     bool shouldSetSyntheticBold = false;
@@ skipping 18 matching lines @@
 
     std::unique_ptr<FontPlatformData> platformData(new FontPlatformData(*substitutePlatformData));
     platformData->setSyntheticBold(shouldSetSyntheticBold);
     platformData->setSyntheticItalic(shouldSetSyntheticItalic);
     return fontDataFromFontPlatformData(platformData.get(), DoNotRetain);
 }
 
 #endif // !OS(ANDROID)
 
 } // namespace blink