Move ServiceWorkerCache backend creation to a lazy init function.

content/browser/service_worker/service_worker_cache_storage.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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_STORAGE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_STORAGE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 95 matching lines @@
       const base::Closure& callback,
       scoped_ptr<std::vector<std::string> > indexed_cache_names);
   void LazyInitIterateAndLoadCacheName(
       const base::Closure& callback,
       scoped_ptr<std::vector<std::string> > indexed_cache_names,
       const std::vector<std::string>::const_iterator& iter,
       const std::string& cache_name,
       scoped_ptr<ServiceWorkerCache> cache);
   void LazyInitDone();
 
-  void DidCreateBackend(base::WeakPtr<ServiceWorkerCache> cache,
-                        CacheID cache_id,
-                        const CacheAndErrorCallback& callback,
-                        ServiceWorkerCache::ErrorType error);
-
   CacheContext* AddCacheToMaps(const std::string& cache_name,
                                scoped_ptr<ServiceWorkerCache> cache);
 
   // The CreateCache callbacks are below.
   void CreateCacheDidCreateCache(const std::string& cache_name,
                                  const CacheAndErrorCallback& callback,
                                  scoped_ptr<ServiceWorkerCache> cache);
   void CreateCacheDidWriteIndex(const CacheAndErrorCallback& callback,
                                 base::WeakPtr<ServiceWorkerCache> cache,
                                 CacheID id,
@@ skipping 31 matching lines @@
   scoped_ptr<CacheLoader> cache_loader_;
 
   base::WeakPtrFactory<ServiceWorkerCacheStorage> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerCacheStorage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_STORAGE_H_