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

third_party/WebKit/Source/core/dom/ElementDataCache.cpp

 /*
  * Copyright (C) 2012, 2013 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 31 matching lines @@
   return !memcmp(attributes.data(), elementData.m_attributeArray,
                  attributes.size() * sizeof(Attribute));
 }
 
 ShareableElementData*
 ElementDataCache::cachedShareableElementDataWithAttributes(
     const Vector<Attribute>& attributes) {
   DCHECK(!attributes.isEmpty());
 
   ShareableElementDataCache::ValueType* it =
-      m_shareableElementDataCache.add(attributeHash(attributes), nullptr)
+      m_shareableElementDataCache.insert(attributeHash(attributes), nullptr)
           .storedValue;
 
   // FIXME: This prevents sharing when there's a hash collision.
   if (it->value && !hasSameAttributes(attributes, *it->value))
     return ShareableElementData::createWithAttributes(attributes);
 
   if (!it->value)
     it->value = ShareableElementData::createWithAttributes(attributes);
 
   return it->value.get();
 }
 
 ElementDataCache::ElementDataCache() {}
 
 DEFINE_TRACE(ElementDataCache) {
   visitor->trace(m_shareableElementDataCache);
 }
 
 }  // namespace blink