Move the bits of Prefs where production code has only trivially easy

chrome/common/json_pref_store.h

-// Copyright (c) 2012 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 CHROME_COMMON_JSON_PREF_STORE_H_
-#define CHROME_COMMON_JSON_PREF_STORE_H_
-
-#include <set>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/observer_list.h"
-#include "chrome/common/important_file_writer.h"
-#include "chrome/common/persistent_pref_store.h"
-
-namespace base {
-class DictionaryValue;
-class MessageLoopProxy;
-class Value;
-}
-
-class FilePath;
-
-// A writable PrefStore implementation that is used for user preferences.
-class JsonPrefStore : public PersistentPrefStore,
-                      public ImportantFileWriter::DataSerializer {
- public:
-  // |file_message_loop_proxy| is the MessageLoopProxy for a thread on which
-  // file I/O can be done.
-  JsonPrefStore(const FilePath& pref_filename,
-                base::MessageLoopProxy* file_message_loop_proxy);
-
-  // PrefStore overrides:
-  virtual ReadResult GetValue(const std::string& key,
-                              const base::Value** result) const OVERRIDE;
-  virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
-  virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
-  virtual size_t NumberOfObservers() const OVERRIDE;
-  virtual bool IsInitializationComplete() const OVERRIDE;
-
-  // PersistentPrefStore overrides:
-  virtual ReadResult GetMutableValue(const std::string& key,
-                                     base::Value** result) OVERRIDE;
-  virtual void SetValue(const std::string& key, base::Value* value) OVERRIDE;
-  virtual void SetValueSilently(const std::string& key,
-                                base::Value* value) OVERRIDE;
-  virtual void RemoveValue(const std::string& key) OVERRIDE;
-  virtual void MarkNeedsEmptyValue(const std::string& key) OVERRIDE;
-  virtual bool ReadOnly() const OVERRIDE;
-  virtual PrefReadError GetReadError() const OVERRIDE;
-  virtual PrefReadError ReadPrefs() OVERRIDE;
-  virtual void ReadPrefsAsync(ReadErrorDelegate* error_delegate) OVERRIDE;
-  virtual void CommitPendingWrite() OVERRIDE;
-  virtual void ReportValueChanged(const std::string& key) OVERRIDE;
-
-  // This method is called after JSON file has been read. Method takes
-  // ownership of the |value| pointer. Note, this method is used with
-  // asynchronous file reading, so class exposes it only for the internal needs.
-  // (read: do not call it manually).
-  void OnFileRead(base::Value* value_owned, PrefReadError error, bool no_dir);
-
- private:
-  virtual ~JsonPrefStore();
-
-  // ImportantFileWriter::DataSerializer overrides:
-  virtual bool SerializeData(std::string* output) OVERRIDE;
-
-  FilePath path_;
-  scoped_refptr<base::MessageLoopProxy> file_message_loop_proxy_;
-
-  scoped_ptr<base::DictionaryValue> prefs_;
-
-  bool read_only_;
-
-  // Helper for safely writing pref data.
-  ImportantFileWriter writer_;
-
-  ObserverList<PrefStore::Observer, true> observers_;
-
-  scoped_ptr<ReadErrorDelegate> error_delegate_;
-
-  bool initialized_;
-  PrefReadError read_error_;
-
-  std::set<std::string> keys_need_empty_value_;
-
-  DISALLOW_COPY_AND_ASSIGN(JsonPrefStore);
-};
-
-#endif  // CHROME_COMMON_JSON_PREF_STORE_H_