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

third_party/WebKit/Source/modules/fetch/FetchManager.cpp

 // 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.
 
 #include "modules/fetch/FetchManager.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
@@ skipping 900 matching lines @@
 ScriptPromise FetchManager::fetch(ScriptState* scriptState,
                                   FetchRequestData* request) {
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ScriptPromise promise = resolver->promise();
 
   request->setContext(WebURLRequest::RequestContextFetch);
 
   Loader* loader =
       Loader::create(getExecutionContext(), this, resolver, request,
                      scriptState->world().isIsolatedWorld());
-  m_loaders.add(loader);
+  m_loaders.insert(loader);
   loader->start();
   return promise;
 }
 
 void FetchManager::contextDestroyed(ExecutionContext*) {
   for (auto& loader : m_loaders)
     loader->dispose();
 }
 
 void FetchManager::onLoaderFinished(Loader* loader) {
   m_loaders.remove(loader);
   loader->dispose();
 }
 
 DEFINE_TRACE(FetchManager) {
   visitor->trace(m_loaders);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink