Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

third_party/WebKit/Source/core/loader/CrossOriginPreflightResultCache.cpp

 /*
  * Copyright (C) 2008, 2009 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 54 matching lines @@
     ++start;
 
   // only white space
   if (start > end)
     return;
 
   // Skip white space from end.
   while (end && isSpaceOrNewline((*stringImpl)[end]))
     --end;
 
-  set.add(string.substring(start, end - start + 1));
+  set.insert(string.substring(start, end - start + 1));
 }
 
 template <class HashType>
 static bool parseAccessControlAllowList(const String& string,
                                         HashSet<String, HashType>& set) {
   unsigned start = 0;
   size_t end;
   while ((end = string.find(',', start)) != kNotFound) {
     if (start != end)
       addToAccessControlAllowList(string, start, end - 1, set);
@@ skipping 115 matching lines @@
     return false;
 
   if (cacheIt->value->allowsRequest(includeCredentials, method, requestHeaders))
     return true;
 
   m_preflightHashMap.remove(cacheIt);
   return false;
 }
 
 }  // namespace blink