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

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

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 69 matching lines @@
   m_observer->setHasTransientRegistration();
 
   if (!m_transientRegistrationNodes) {
     m_transientRegistrationNodes = new NodeHashSet;
 
     DCHECK(m_registrationNode);
     DCHECK(!m_registrationNodeKeepAlive);
     m_registrationNodeKeepAlive =
         m_registrationNode.get();  // Balanced in clearTransientRegistrations.
   }
-  m_transientRegistrationNodes->add(&node);
+  m_transientRegistrationNodes->insert(&node);
 }
 
 void MutationObserverRegistration::clearTransientRegistrations() {
   if (!m_transientRegistrationNodes) {
     DCHECK(!m_registrationNodeKeepAlive);
     return;
   }
 
   for (auto& node : *m_transientRegistrationNodes)
     node->unregisterTransientMutationObserver(this);
@@ skipping 31 matching lines @@
 
   if (!attributeName->namespaceURI().isNull())
     return false;
 
   return m_attributeFilter.contains(attributeName->localName());
 }
 
 void MutationObserverRegistration::addRegistrationNodesToSet(
     HeapHashSet<Member<Node>>& nodes) const {
   DCHECK(m_registrationNode);
-  nodes.add(m_registrationNode.get());
+  nodes.insert(m_registrationNode.get());
   if (!m_transientRegistrationNodes)
     return;
   for (NodeHashSet::const_iterator iter = m_transientRegistrationNodes->begin();
        iter != m_transientRegistrationNodes->end(); ++iter)
-    nodes.add(iter->get());
+    nodes.insert(iter->get());
 }
 
 DEFINE_TRACE(MutationObserverRegistration) {
   visitor->trace(m_observer);
   visitor->trace(m_registrationNode);
   visitor->trace(m_registrationNodeKeepAlive);
   visitor->trace(m_transientRegistrationNodes);
 }
 
 DEFINE_TRACE_WRAPPERS(MutationObserverRegistration) {
   visitor->traceWrappers(m_observer);
 }
 
 }  // namespace blink