Migrate WTF::HashMap::add() to ::insert()

third_party/WebKit/Source/core/css/CSSFontFaceSource.cpp

 /*
  * Copyright (C) 2007, 2008, 2010, 2011 Apple 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 36 matching lines @@
     // We're local. Just return a SimpleFontData from the normal cache.
     return createFontData(fontDescription);
   }
 
   // See if we have a mapping in our FontData cache.
   // TODO(drott): Check whether losing traits information here is problematic.
   // crbug.com/516677
   FontCacheKey key = fontDescription.cacheKey(FontFaceCreationParams());
 
   RefPtr<SimpleFontData>& fontData =
-      m_fontDataTable.add(key, nullptr).storedValue->value;
+      m_fontDataTable.insert(key, nullptr).storedValue->value;
   if (!fontData)
     fontData = createFontData(fontDescription);
   // No release, because fontData is a reference to a RefPtr that is held in the
   // m_fontDataTable.
   return fontData;
 }
 
 DEFINE_TRACE(CSSFontFaceSource) {
   visitor->trace(m_face);
 }
 
 }  // namespace blink