Use a FontPlatformData pointer for FontDataCache's key

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 116 matching lines @@
     if (fallbackFont.isItalic && description.style() == FontStyleNormal)
         description.setStyle(FontStyleItalic);
     if (!fallbackFont.isItalic && (description.style() == FontStyleItalic || description.style() == FontStyleOblique)) {
         shouldSetSyntheticItalic = true;
         description.setStyle(FontStyleNormal);
     }
 
     FontPlatformData* substitutePlatformData = getFontPlatformData(description, creationParams);
     if (!substitutePlatformData)
         return nullptr;
-    FontPlatformData platformData = FontPlatformData(*substitutePlatformData);
-    platformData.setSyntheticBold(shouldSetSyntheticBold);
-    platformData.setSyntheticItalic(shouldSetSyntheticItalic);
-    return fontDataFromFontPlatformData(&platformData, DoNotRetain);
+
+    std::unique_ptr<FontPlatformData> platformData(new FontPlatformData(*substitutePlatformData));
+    platformData->setSyntheticBold(shouldSetSyntheticBold);
+    platformData->setSyntheticItalic(shouldSetSyntheticItalic);
+    return fontDataFromFontPlatformData(platformData.get(), DoNotRetain);
 }
 
 #endif // !OS(ANDROID)
 
 } // namespace blink