[CacheStorage] Temporarily preserve recently opened caches from CacheStorageDispatcherHost

content/browser/cache_storage/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_CACHE_STORAGE_CACHE_STORAGE_H_
 #define CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 94 matching lines @@
   void Size(const SizeCallback& callback);
 
   // The functions below are for tests to verify that the operations run
   // serially.
   void StartAsyncOperationForTesting();
   void CompleteAsyncOperationForTesting();
 
  private:
   friend class CacheStorageCacheHandle;
   friend class CacheStorageCache;
-  friend class TestCacheStorage;
   class CacheLoader;
   class MemoryLoader;
   class SimpleCacheLoader;
   struct CacheMatchResponse;
 
   typedef std::map<std::string, std::unique_ptr<CacheStorageCache>> CacheMap;
 
   // Functions for exposing handles to CacheStorageCache to clients.
   std::unique_ptr<CacheStorageCacheHandle> CreateCacheHandle(
       CacheStorageCache* cache);
   void AddCacheHandleRef(CacheStorageCache* cache);
   void DropCacheHandleRef(CacheStorageCache* cache);
 
   // Returns a CacheStorageCacheHandle for the given name if the name is known.
   // If the CacheStorageCache has been deleted, creates a new one.
   std::unique_ptr<CacheStorageCacheHandle> GetLoadedCache(
       const std::string& cache_name);
 
-  // Holds a reference to a cache for a short period in case they're used again
-  // soon.
-  void TemporarilyPreserveCache(
-      std::unique_ptr<CacheStorageCacheHandle> cache_handle);
-  virtual void SchedulePreservedCacheRemoval(
-      const base::Closure& callback);  // Virtual for testing.
-  void RemovePreservedCache(const CacheStorageCache* cache);
-
   // Initializer and its callback are below.
   void LazyInit();
   void LazyInitImpl();
   void LazyInitDidLoadIndex(
       std::unique_ptr<std::vector<std::string>> indexed_cache_names);
 
   // The Open and CreateCache callbacks are below.
   void OpenCacheImpl(const std::string& cache_name,
                      const CacheAndErrorCallback& callback);
   void CreateCacheDidCreateCache(const std::string& cache_name,
@@ skipping 101 matching lines @@
 
   // The file path for this CacheStorage.
   base::FilePath origin_path_;
 
   // The TaskRunner to run file IO on.
   scoped_refptr<base::SequencedTaskRunner> cache_task_runner_;
 
   // Performs backend specific operations (memory vs disk).
   std::unique_ptr<CacheLoader> cache_loader_;
 
-  // Holds handles to recently opened caches so that they can be reused
-  // without having to open the cache again.
-  std::map<const CacheStorageCache*, std::unique_ptr<CacheStorageCacheHandle>>
-      preserved_caches_;
-
   // The quota manager.
   scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy_;
 
   // The origin that this CacheStorage is associated with.
   GURL origin_;
 
   base::WeakPtrFactory<CacheStorage> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CacheStorage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_H_