Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

chrome/browser/prefs/pref_registry.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_PREFS_PREF_REGISTRY_H_
-#define CHROME_BROWSER_PREFS_PREF_REGISTRY_H_
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/prefs/pref_value_map.h"
-
-namespace base {
-class Value;
-}
-
-class DefaultPrefStore;
-class PrefStore;
-
-// Preferences need to be registered with a type and default value
-// before they are used.
-//
-// The way you use a PrefRegistry is that you register all required
-// preferences on it (via one of its subclasses), then pass it as a
-// construction parameter to PrefService.
-//
-// Currently, registrations after constructing the PrefService will
-// also work, but this is being deprecated.
-class PrefRegistry : public base::RefCounted<PrefRegistry> {
- public:
-  typedef PrefValueMap::const_iterator const_iterator;
-  typedef base::Callback<void(const char*, base::Value*)> RegistrationCallback;
-  typedef base::Callback<void(const char*)> UnregistrationCallback;
-
-  PrefRegistry();
-
-  // Gets the registered defaults.
-  scoped_refptr<PrefStore> defaults();
-
-  // Allows iteration over defaults.
-  const_iterator begin() const;
-  const_iterator end() const;
-
-  // Exactly one callback can be set for each of two events:
-  // Registration and unregistration. If either is set, the callback
-  // will be invoked each time registration and/or unregistration has
-  // been performed on this object.
-  //
-  // Calling either of these methods after a callback has already been
-  // set will make the object forget the previous callback and use the
-  // new one instead.
-  void SetRegistrationCallback(const RegistrationCallback& callback);
-  void SetUnregistrationCallback(const UnregistrationCallback& callback);
-
-  // Unregisters a preference. This is going away soon.
-  void DeprecatedUnregisterPreference(const char* path);
-
- protected:
-  friend class base::RefCounted<PrefRegistry>;
-  virtual ~PrefRegistry();
-
-  // Used by subclasses to register a default value for a preference.
-  void RegisterPreference(const char* path, base::Value* default_value);
-
-  scoped_refptr<DefaultPrefStore> defaults_;
-
- private:
-  RegistrationCallback registration_callback_;
-  UnregistrationCallback unregistration_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrefRegistry);
-};
-
-#endif  // CHROME_BROWSER_PREFS_PREF_REGISTRY_H_