[NOT FOR COMMIT] Nested types CL 1

third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp

 // Copyright 2017 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/background_fetch/BackgroundFetchManager.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
+#include "bindings/modules/v8/RequestOrUSVStringOrRequestOrUSVStringSequence.h"
 #include "modules/background_fetch/BackgroundFetchOptions.h"
 #include "modules/background_fetch/BackgroundFetchRegistration.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 
 namespace blink {
 
 BackgroundFetchManager::BackgroundFetchManager(
     ServiceWorkerRegistration* registration)
     : m_registration(registration) {
   DCHECK(registration);
 }
 
 ScriptPromise BackgroundFetchManager::fetch(
     ScriptState* scriptState,
     String tag,
-    HeapVector<RequestOrUSVString> requests,
+    const RequestOrUSVStringOrRequestOrUSVStringSequence& requests,
     const BackgroundFetchOptions& options) {
+  if (requests.isRequest()) {
+    LOG(INFO) << "We were passed a Request IDL object.";
+  } else if (requests.isUSVString()) {
+    LOG(INFO) << "We were passed an USVString.";
+  } else if (requests.isRequestOrUSVStringSequence()) {
+    LOG(INFO) << "We were passed a sequence<(Request or USVString)>.";
+  } else /* requests.isNull() */ {
+    NOTREACHED();
+  }
+
   if (!m_registration->active()) {
     return ScriptPromise::reject(
         scriptState,
         V8ThrowException::createTypeError(scriptState->isolate(),
                                           "No active registration available on "
                                           "the ServiceWorkerRegistration."));
   }
 
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ScriptPromise promise = resolver->promise();
@@ skipping 46 matching lines @@
   resolver->resolve(Vector<String>());
 
   return promise;
 }
 
 DEFINE_TRACE(BackgroundFetchManager) {
   visitor->trace(m_registration);
 }
 
 }  // namespace blink