Revert 280400 "Creation of a new and improved object for the cac..."

trunk/src/net/http/disk_based_cert_cache.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 NET_HTTP_DISK_BASED_CERT_CACHE_H
-#define NET_HTTP_DISK_BASED_CERT_CACHE_H
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/containers/hash_tables.h"
-#include "base/memory/weak_ptr.h"
-#include "net/base/net_export.h"
-#include "net/cert/x509_certificate.h"
-
-namespace disk_cache {
-class Backend;
-}  // namespace disk_cache
-
-namespace net {
-
-// DiskBasedCertCache is used to store and retrieve X.509 certificates from the
-// cache. Each individual certificate is stored separately from its certificate
-// chain. No more than one copy (per certificate) will be stored on disk.
-class NET_EXPORT_PRIVATE DiskBasedCertCache {
- public:
-  typedef base::Callback<void(const X509Certificate::OSCertHandle cert_handle)>
-      GetCallback;
-  typedef base::Callback<void(const std::string&)> SetCallback;
-
-  // Initializes a new DiskBasedCertCache that will use |backend|, which has
-  // previously been initialized, to store the certificate in the cache.
-  explicit DiskBasedCertCache(disk_cache::Backend* backend);
-  ~DiskBasedCertCache();
-
-  // Fetches the certificate associated with |key|. If the certificate is
-  // found within the cache, |cb| will be called with the certificate.
-  // Otherwise, |cb| will be called with NULL. Callers that wish to store
-  // a reference to the certificate need to use X509Certificate::DupOSCertHandle
-  // inside |cb|.
-  void Get(const std::string& key, const GetCallback& cb);
-
-  // Stores |cert_handle| in the cache. If |cert_handle| is successfully stored,
-  // |cb| will be called with the key. If |cb| is called with an empty
-  // string, then |cert_handle| was not stored.
-  void Set(const X509Certificate::OSCertHandle cert_handle,
-           const SetCallback& cb);
-
- private:
-  class ReadWorker;
-  class WriteWorker;
-
-  // ReadWorkerMap and WriteWorkerMap map cache keys to their
-  // corresponding Workers.
-  typedef base::hash_map<std::string, ReadWorker*> ReadWorkerMap;
-  typedef base::hash_map<std::string, WriteWorker*> WriteWorkerMap;
-
-  // FinishedReadOperation and FinishedWriteOperation are used by callbacks
-  // given to the workers to signal the DiskBasedCertCache they have completed
-  // their work.
-  void FinishedReadOperation(const std::string& key);
-  void FinishedWriteOperation(const std::string& key);
-
-  ReadWorkerMap read_worker_map_;
-  WriteWorkerMap write_worker_map_;
-
-  disk_cache::Backend* backend_;
-  base::WeakPtrFactory<DiskBasedCertCache> weak_factory_;
-  DISALLOW_COPY_AND_ASSIGN(DiskBasedCertCache);
-};
-
-}  // namespace net
-
-#endif  // NET_HTTP_DISK_BASED_CERT_CACHE_H