Make Service Worker DB UserData methods accept multiple keys at once

content/browser/service_worker/service_worker_registration.h

 // Copyright 2013 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 14 matching lines @@
 
 // Represents the core of a service worker registration object. Other
 // registration derivatives (WebServiceWorkerRegistration etc) ultimately refer
 // to this class. This is refcounted via ServiceWorkerRegistrationHandle to
 // facilitate multiple controllees being associated with the same registration.
 class CONTENT_EXPORT ServiceWorkerRegistration
     : NON_EXPORTED_BASE(public base::RefCounted<ServiceWorkerRegistration>),
       public ServiceWorkerVersion::Listener {
  public:
   typedef base::Callback<void(ServiceWorkerStatusCode status)> StatusCallback;
-  typedef base::Callback<void(
-      const std::string& data,
-      ServiceWorkerStatusCode status)> GetUserDataCallback;
 
   class Listener {
    public:
     virtual void OnVersionAttributesChanged(
         ServiceWorkerRegistration* registration,
         ChangedVersionAttributesMask changed_mask,
         const ServiceWorkerRegistrationInfo& info) {}
     virtual void OnRegistrationFailed(
         ServiceWorkerRegistration* registration) {}
     virtual void OnRegistrationFinishedUninstalling(
@@ skipping 139 matching lines @@
   base::ObserverList<Listener> listeners_;
   std::vector<base::Closure> registration_finished_callbacks_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_