Make browsing_data component a layered component

components/browsing_data/storage_partition_http_cache_data_remover.h

-// Copyright 2015 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 COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_
-#define COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_
-
-#include <stdint.h>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/sequenced_task_runner_helpers.h"
-#include "base/time/time.h"
-#include "net/base/completion_callback.h"
-#include "url/gurl.h"
-
-namespace content {
-class StoragePartition;
-}
-
-namespace disk_cache {
-class Backend;
-}
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-namespace browsing_data {
-
-// Helper to remove http cache data from a StoragePartition.
-class StoragePartitionHttpCacheDataRemover {
- public:
-  // Creates a StoragePartitionHttpCacheDataRemover that deletes cache entries
-  // in the time range between |delete_begin| (inclusively) and |delete_end|
-  // (exclusively).
-  static StoragePartitionHttpCacheDataRemover* CreateForRange(
-      content::StoragePartition* storage_partition,
-      base::Time delete_begin,
-      base::Time delete_end);
-
-  // Similar to CreateForRange(), but only deletes URLs that are matched by
-  // |url_predicate|. Note that the deletion with URL filtering is not built in
-  // to the cache interface and might be slower.
-  static StoragePartitionHttpCacheDataRemover* CreateForURLsAndRange(
-      content::StoragePartition* storage_partition,
-      const base::Callback<bool(const GURL&)>& url_predicate,
-      base::Time delete_begin,
-      base::Time delete_end);
-
-  // Calls |done_callback| upon completion and also destroys itself.
-  void Remove(const base::Closure& done_callback);
-
-  // Counts the total size of entries that would be removed by calling |Remove|.
-  // Reports it via |result_callback| and then destroys itself.
-  void Count(const net::Int64CompletionCallback& result_callback);
-
- private:
-  enum CacheState {
-    STATE_NONE,
-    STATE_CREATE_MAIN,
-    STATE_CREATE_MEDIA,
-    STATE_PROCESS_MAIN,
-    STATE_PROCESS_MEDIA,
-    STATE_DONE
-  };
-
-  StoragePartitionHttpCacheDataRemover(
-      base::Callback<bool(const GURL&)> url_predicate,
-      base::Time delete_begin,
-      base::Time delete_end,
-      net::URLRequestContextGetter* main_context_getter,
-      net::URLRequestContextGetter* media_context_getter);
-
-  // StoragePartitionHttpCacheDataRemover deletes itself (using DeleteHelper)
-  // and is not supposed to be deleted by other objects so make destructor
-  // private and DeleteHelper a friend.
-  friend class base::DeleteHelper<StoragePartitionHttpCacheDataRemover>;
-
-  ~StoragePartitionHttpCacheDataRemover();
-
-  void ClearHttpCacheOnIOThread();
-  void CountHttpCacheOnIOThread();
-
-  void ClearedHttpCache();
-  void CountedHttpCache();
-
-  // Performs the actual work to delete or count the cache.
-  void DoClearCache(int rv);
-  void DoCountCache(int rv);
-
-  base::Callback<bool(const GURL&)> url_predicate_;
-  const base::Time delete_begin_;
-  const base::Time delete_end_;
-
-  const scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
-  const scoped_refptr<net::URLRequestContextGetter> media_context_getter_;
-
-  base::Closure done_callback_;
-  net::Int64CompletionCallback result_callback_;
-
-  // IO.
-  int next_cache_state_;
-  disk_cache::Backend* cache_;
-
-  // Stores the cache size computation result before it can be returned
-  // via a callback. This is either the sum of size of the the two cache
-  // backends, or an error code if the calculation failed.
-  int64_t calculation_result_;
-
-  DISALLOW_COPY_AND_ASSIGN(StoragePartitionHttpCacheDataRemover);
-};
-
-}  // namespace browsing_data
-
-#endif  // COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_