Migrate WTF::Vector::append() to ::push_back() [part 13 of N]

third_party/WebKit/Source/modules/serviceworkers/ServiceWorkerRegistration.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ServiceWorkerRegistration_h
 #define ServiceWorkerRegistration_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/ContextLifecycleObserver.h"
@@ skipping 98 matching lines @@
 
  public:
   // Called from CallbackPromiseAdapter.
   using WebType = std::unique_ptr<
       WebVector<std::unique_ptr<WebServiceWorkerRegistration::Handle>>>;
   static HeapVector<Member<ServiceWorkerRegistration>> take(
       ScriptPromiseResolver* resolver,
       WebType webServiceWorkerRegistrations) {
     HeapVector<Member<ServiceWorkerRegistration>> registrations;
     for (auto& registration : *webServiceWorkerRegistrations) {
-      registrations.append(
+      registrations.push_back(
           ServiceWorkerRegistration::take(resolver, std::move(registration)));
     }
     return registrations;
   }
 };
 
 }  // namespace blink
 
 #endif  // ServiceWorkerRegistration_h