Rename DataReductionProxyStatisticsPrefs to DataReductionProxyCompressionStats

components/data_reduction_proxy/core/browser/data_reduction_proxy_statistics_prefs.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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STATISTICS_PREFS_H_
-#define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STATISTICS_PREFS_H_
-
-#include <map>
-
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "base/time/time.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_pref_names.h"
-
-class PrefChangeRegistrar;
-class PrefService;
-
-namespace base {
-class ListValue;
-class SequencedTaskRunner;
-class Value;
-}
-
-namespace data_reduction_proxy {
-
-// Data reduction proxy delayed pref service reduces the number calls to pref
-// service by storing prefs in memory and writing to the given PrefService after
-// |delay| amount of time. If |delay| is zero, the delayed pref service writes
-// directly to the PrefService and does not store the prefs in memory. All
-// prefs must be stored and read on the UI thread.
-// TODO(bengr): Rename as DataReductionProxyCompressionStats.
-class DataReductionProxyStatisticsPrefs {
-public:
-  // Constructs a data reduction proxy delayed pref service object using
-  // |pref_service|. Writes prefs to |pref_service| after |delay|
-  // and stores them in |pref_map_| and |list_pref_map| between writes.
-  // If |delay| is zero, writes directly to the PrefService and does not store
-  // in the maps.
-  DataReductionProxyStatisticsPrefs(
-      PrefService* pref_service,
-      scoped_refptr<base::SequencedTaskRunner> task_runner,
-      const base::TimeDelta& delay);
-  ~DataReductionProxyStatisticsPrefs();
-
-  // Loads all data_reduction_proxy::prefs into the |pref_map_| and
-  // |list_pref_map_|.
-  void Init();
-
-  void OnUpdateContentLengths();
-
-  // Gets the int64 pref at |pref_path| from the |DataReductionProxyPrefMap|.
-  int64 GetInt64(const char* pref_path);
-
-  // Updates the pref value in the |DataReductionProxyPrefMap| map.
-  // The pref is later written to |pref service_|.
-  void SetInt64(const char* pref_path, int64 pref_value);
-
-  // Gets the pref list at |pref_path| from the |DataReductionProxyPrefMap|.
-  base::ListValue* GetList(const char* pref_path);
-
-  // Writes the prefs stored in |DataReductionProxyPrefMap| and
-  // |DataReductionProxyListPrefMap| to |pref_service|.
-  void WritePrefs();
-
-  // Creates a |Value| summary of the persistent state of the network session.
-  // The caller is responsible for deleting the returned value.
-  // Must be called on the UI thread.
-  base::Value* HistoricNetworkStatsInfoToValue();
-
-  base::WeakPtr<DataReductionProxyStatisticsPrefs> GetWeakPtr();
-
-private:
-  typedef std::map<const char*, int64> DataReductionProxyPrefMap;
-  typedef base::ScopedPtrHashMap<const char*, base::ListValue>
-      DataReductionProxyListPrefMap;
-
-  // Gets the value of |pref| from the pref service and adds it to the
-  // |pref_map|.
-  void InitInt64Pref(const char* pref);
-
-  // Gets the value of |pref| from the pref service and adds it to the
-  // |list_pref_map|.
-  void InitListPref(const char* pref);
-
-  // Writes the stored prefs to |pref_service| and then posts another a delayed
-  // task to write prefs again in |kMinutesBetweenWrites|.
-  void DelayedWritePrefs();
-
-  // Copies the values at each index of |from_list| to the same index in
-  // |to_list|.
-  void TransferList(const base::ListValue& from_list,
-                    base::ListValue* to_list);
-
-  // Gets an int64, stored as a string, in a ListPref at the specified
-  // index.
-  int64 GetListPrefInt64Value(const base::ListValue& list_update, size_t index);
-
-  // Clears all data saving statistics.
-  void ClearDataSavingStatistics();
-
-  PrefService* pref_service_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-  const base::TimeDelta delay_;
-  bool delayed_task_posted_;
-  DataReductionProxyPrefMap pref_map_;
-  DataReductionProxyListPrefMap list_pref_map_;
-  scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;
-  base::ThreadChecker thread_checker_;
-
-  base::WeakPtrFactory<DataReductionProxyStatisticsPrefs> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(DataReductionProxyStatisticsPrefs);
-};
-
-}  // namespace data_reduction_proxy
-
-#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STATISTICS_PREFS_H_