Revert of Evict Service Worker when reading it from disk cache fails.

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 <string>
 
 #include "base/basictypes.h"
@@ skipping 119 matching lines @@
   // this registration in the storage. Stored data is deleted when this
   // registration is deleted from the storage.
   void GetUserData(const std::string& key,
                    const GetUserDataCallback& callback);
   void StoreUserData(const std::string& key,
                      const std::string& data,
                      const StatusCallback& callback);
   void ClearUserData(const std::string& key,
                      const StatusCallback& callback);
 
-  // Unsets the version and deletes its resources. Also deletes this
-  // registration from storage if there is no longer a stored version.
-  void DeleteVersion(const scoped_refptr<ServiceWorkerVersion>& version);
-
  private:
   friend class base::RefCounted<ServiceWorkerRegistration>;
 
   ~ServiceWorkerRegistration() override;
 
   void UnsetVersionInternal(
       ServiceWorkerVersion* version,
       ChangedVersionAttributesMask* mask);
 
   // ServiceWorkerVersion::Listener override.
@@ skipping 26 matching lines @@
   scoped_refptr<ServiceWorkerVersion> installing_version_;
   ObserverList<Listener> listeners_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_