Move Chrome OS device settings stuff to chrome/browser/chromeos/settings.

chrome/browser/chromeos/cros_settings.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_BROWSER_CHROMEOS_CROS_SETTINGS_H_
-#define CHROME_BROWSER_CHROMEOS_CROS_SETTINGS_H_
-
-#include <string>
-#include <vector>
-
-#include "base/callback_forward.h"
-#include "base/hash_tables.h"
-#include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
-#include "chrome/browser/chromeos/cros_settings_names.h"
-#include "chrome/browser/chromeos/cros_settings_provider.h"
-#include "content/public/browser/notification_observer.h"
-
-namespace base {
-template <typename T> struct DefaultLazyInstanceTraits;
-class ListValue;
-class Value;
-}
-
-namespace chromeos {
-
-// This class manages per-device/global settings.
-class CrosSettings : public base::NonThreadSafe {
- public:
-  // Class factory.
-  static CrosSettings* Get();
-
-  // Helper function to test if the given |path| is a valid cros setting.
-  static bool IsCrosSettings(const std::string& path);
-
-  // Sets |in_value| to given |path| in cros settings.
-  void Set(const std::string& path, const base::Value& in_value);
-
-  // Returns setting value for the given |path|.
-  const base::Value* GetPref(const std::string& path) const;
-
-  // Requests all providers to fetch their values from a trusted store, if they
-  // haven't done so yet. Returns true if the cros settings returned by |this|
-  // are trusted during the current loop cycle; otherwise returns false, and
-  // |callback| will be invoked later when trusted values become available.
-  // PrepareTrustedValues() should be tried again in that case.
-  virtual CrosSettingsProvider::TrustedStatus PrepareTrustedValues(
-      const base::Closure& callback) const;
-
-  // Convenience forms of Set().  These methods will replace any existing
-  // value at that |path|, even if it has a different type.
-  void SetBoolean(const std::string& path, bool in_value);
-  void SetInteger(const std::string& path, int in_value);
-  void SetDouble(const std::string& path, double in_value);
-  void SetString(const std::string& path, const std::string& in_value);
-
-  // Convenience functions for manipulating lists. Note that the following
-  // functions employs a read, modify and write pattern. If underlying settings
-  // provider updates its value asynchronously such as DeviceSettingsProvider,
-  // value cache they read from might not be fresh and multiple calls to those
-  // function would lose data. See http://crbug.com/127215
-  void AppendToList(const std::string& path, const base::Value* value);
-  void RemoveFromList(const std::string& path, const base::Value* value);
-
-  // These are convenience forms of Get().  The value will be retrieved
-  // and the return value will be true if the |path| is valid and the value at
-  // the end of the path can be returned in the form specified.
-  bool GetBoolean(const std::string& path, bool* out_value) const;
-  bool GetInteger(const std::string& path, int* out_value) const;
-  bool GetDouble(const std::string& path, double* out_value) const;
-  bool GetString(const std::string& path, std::string* out_value) const;
-  bool GetList(const std::string& path,
-               const base::ListValue** out_value) const;
-
-  // Helper function for the whitelist op. Implemented here because we will need
-  // this in a few places. The functions searches for |email| in the pref |path|
-  // It respects whitelists so foo@bar.baz will match *@bar.baz too.
-  bool FindEmailInList(const std::string& path, const std::string& email) const;
-
-  // Adding/removing of providers.
-  bool AddSettingsProvider(CrosSettingsProvider* provider);
-  bool RemoveSettingsProvider(CrosSettingsProvider* provider);
-
-  // If the pref at the given |path| changes, we call the observer's Observe
-  // method with NOTIFICATION_SYSTEM_SETTING_CHANGED.
-  void AddSettingsObserver(const char* path,
-                           content::NotificationObserver* obs);
-  void RemoveSettingsObserver(const char* path,
-                              content::NotificationObserver* obs);
-
-  // Returns the provider that handles settings with the |path| or prefix.
-  CrosSettingsProvider* GetProvider(const std::string& path) const;
-
-  // Forces all providers to reload their caches from the respective backing
-  // stores if they have any.
-  void ReloadProviders();
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<CrosSettings>;
-
-  // List of ChromeOS system settings providers.
-  std::vector<CrosSettingsProvider*> providers_;
-
-  // A map from settings names to a list of observers. Observers get fired in
-  // the order they are added.
-  typedef ObserverList<content::NotificationObserver, true>
-      NotificationObserverList;
-  typedef base::hash_map<std::string, NotificationObserverList*>
-      SettingsObserverMap;
-  SettingsObserverMap settings_observers_;
-
-  CrosSettings();
-  ~CrosSettings();
-
-  // Fires system setting change notification.
-  void FireObservers(const std::string& path);
-
-  DISALLOW_COPY_AND_ASSIGN(CrosSettings);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_CROS_SETTINGS_H_