Migrate WTF::Vector::append() to ::push_back() [part 4 of N]

third_party/WebKit/Source/core/dom/MutationObserver.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 168 matching lines @@
 
 static void activateObserver(MutationObserver* observer) {
   if (activeMutationObservers().isEmpty())
     Microtask::enqueueMicrotask(WTF::bind(&MutationObserver::deliverMutations));
 
   activeMutationObservers().add(observer);
 }
 
 void MutationObserver::enqueueMutationRecord(MutationRecord* mutation) {
   DCHECK(isMainThread());
-  m_records.append(mutation);
+  m_records.push_back(mutation);
   activateObserver(this);
   InspectorInstrumentation::asyncTaskScheduled(
       m_callback->getExecutionContext(), mutation->type(), mutation);
 }
 
 void MutationObserver::setHasTransientRegistration() {
   DCHECK(isMainThread());
   activateObserver(this);
 }
 
@@ skipping 17 matching lines @@
 
 void MutationObserver::deliver() {
   DCHECK(!shouldBeSuspended());
 
   // Calling clearTransientRegistrations() can modify m_registrations, so it's
   // necessary to make a copy of the transient registrations before operating on
   // them.
   HeapVector<Member<MutationObserverRegistration>, 1> transientRegistrations;
   for (auto& registration : m_registrations) {
     if (registration->hasTransientRegistrations())
-      transientRegistrations.append(registration);
+      transientRegistrations.push_back(registration);
   }
   for (const auto& registration : transientRegistrations)
     registration->clearTransientRegistrations();
 
   if (m_records.isEmpty())
     return;
 
   MutationRecordVector records;
   records.swap(m_records);
 
@@ skipping 33 matching lines @@
 }
 
 DEFINE_TRACE(MutationObserver) {
   visitor->trace(m_callback);
   visitor->trace(m_records);
   visitor->trace(m_registrations);
   visitor->trace(m_callback);
 }
 
 }  // namespace blink