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

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

 /*
  * Copyright (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 149 matching lines @@
   }
 }
 
 SpaceSplitString::Data::~Data() {
   if (!m_keyString.isNull())
     sharedDataMap().erase(m_keyString);
 }
 
 PassRefPtr<SpaceSplitString::Data> SpaceSplitString::Data::create(
     const AtomicString& string) {
-  Data*& data = sharedDataMap().add(string, nullptr).storedValue->value;
+  Data*& data = sharedDataMap().insert(string, nullptr).storedValue->value;
   if (!data) {
     data = new Data(string);
     return adoptRef(data);
   }
   return data;
 }
 
 PassRefPtr<SpaceSplitString::Data> SpaceSplitString::Data::createUnique(
     const Data& other) {
   return adoptRef(new SpaceSplitString::Data(other));
 }
 
 SpaceSplitString::Data::Data(const AtomicString& string) : m_keyString(string) {
   DCHECK(!string.isNull());
   createVector(string);
 }
 
 SpaceSplitString::Data::Data(const SpaceSplitString::Data& other)
     : RefCounted<Data>(), m_vector(other.m_vector) {
   // Note that we don't copy m_keyString to indicate to the destructor that
   // there's nothing to be removed from the sharedDataMap().
 }
 
 }  // namespace blink