Revert of Move base/prefs to components/prefs

components/prefs/pref_member.cc

Index: components/prefs/pref_member.cc
diff --git a/components/prefs/pref_member.cc b/components/prefs/pref_member.cc
deleted file mode 100644
index 934237d37ca9df1ba474799721e6dfe7a582f78b..0000000000000000000000000000000000000000
--- a/components/prefs/pref_member.cc
+++ /dev/null
@@ -1,223 +0,0 @@
-// 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.
-
-#include "base/prefs/pref_member.h"
-
-#include <utility>
-
-#include "base/callback.h"
-#include "base/callback_helpers.h"
-#include "base/location.h"
-#include "base/prefs/pref_service.h"
-#include "base/thread_task_runner_handle.h"
-#include "base/value_conversions.h"
-
-using base::SingleThreadTaskRunner;
-
-namespace subtle {
-
-PrefMemberBase::PrefMemberBase()
-    : prefs_(NULL),
-      setting_value_(false) {
-}
-
-PrefMemberBase::~PrefMemberBase() {
-  Destroy();
-}
-
-void PrefMemberBase::Init(const std::string& pref_name,
-                          PrefService* prefs,
-                          const NamedChangeCallback& observer) {
-  observer_ = observer;
-  Init(pref_name, prefs);
-}
-
-void PrefMemberBase::Init(const std::string& pref_name, PrefService* prefs) {
-  DCHECK(prefs);
-  DCHECK(pref_name_.empty());  // Check that Init is only called once.
-  prefs_ = prefs;
-  pref_name_ = pref_name;
-  // Check that the preference is registered.
-  DCHECK(prefs_->FindPreference(pref_name_)) << pref_name << " not registered.";
-
-  // Add ourselves as a pref observer so we can keep our local value in sync.
-  prefs_->AddPrefObserver(pref_name, this);
-}
-
-void PrefMemberBase::Destroy() {
-  if (prefs_ && !pref_name_.empty()) {
-    prefs_->RemovePrefObserver(pref_name_, this);
-    prefs_ = NULL;
-  }
-}
-
-void PrefMemberBase::MoveToThread(
-    scoped_refptr<SingleThreadTaskRunner> task_runner) {
-  VerifyValuePrefName();
-  // Load the value from preferences if it hasn't been loaded so far.
-  if (!internal())
-    UpdateValueFromPref(base::Closure());
-  internal()->MoveToThread(std::move(task_runner));
-}
-
-void PrefMemberBase::OnPreferenceChanged(PrefService* service,
-                                         const std::string& pref_name) {
-  VerifyValuePrefName();
-  UpdateValueFromPref((!setting_value_ && !observer_.is_null()) ?
-      base::Bind(observer_, pref_name) : base::Closure());
-}
-
-void PrefMemberBase::UpdateValueFromPref(const base::Closure& callback) const {
-  VerifyValuePrefName();
-  const PrefService::Preference* pref = prefs_->FindPreference(pref_name_);
-  DCHECK(pref);
-  if (!internal())
-    CreateInternal();
-  internal()->UpdateValue(pref->GetValue()->DeepCopy(),
-                          pref->IsManaged(),
-                          pref->IsUserModifiable(),
-                          callback);
-}
-
-void PrefMemberBase::VerifyPref() const {
-  VerifyValuePrefName();
-  if (!internal())
-    UpdateValueFromPref(base::Closure());
-}
-
-void PrefMemberBase::InvokeUnnamedCallback(const base::Closure& callback,
-                                           const std::string& pref_name) {
-  callback.Run();
-}
-
-PrefMemberBase::Internal::Internal()
-    : thread_task_runner_(base::ThreadTaskRunnerHandle::Get()),
-      is_managed_(false),
-      is_user_modifiable_(false) {
-}
-PrefMemberBase::Internal::~Internal() { }
-
-bool PrefMemberBase::Internal::IsOnCorrectThread() const {
-  return thread_task_runner_->BelongsToCurrentThread();
-}
-
-void PrefMemberBase::Internal::UpdateValue(
-    base::Value* v,
-    bool is_managed,
-    bool is_user_modifiable,
-    const base::Closure& callback) const {
-  scoped_ptr<base::Value> value(v);
-  base::ScopedClosureRunner closure_runner(callback);
-  if (IsOnCorrectThread()) {
-    bool rv = UpdateValueInternal(*value);
-    DCHECK(rv);
-    is_managed_ = is_managed;
-    is_user_modifiable_ = is_user_modifiable;
-  } else {
-    bool may_run = thread_task_runner_->PostTask(
-        FROM_HERE, base::Bind(&PrefMemberBase::Internal::UpdateValue, this,
-                              value.release(), is_managed, is_user_modifiable,
-                              closure_runner.Release()));
-    DCHECK(may_run);
-  }
-}
-
-void PrefMemberBase::Internal::MoveToThread(
-    scoped_refptr<SingleThreadTaskRunner> task_runner) {
-  CheckOnCorrectThread();
-  thread_task_runner_ = std::move(task_runner);
-}
-
-bool PrefMemberVectorStringUpdate(const base::Value& value,
-                                  std::vector<std::string>* string_vector) {
-  if (!value.IsType(base::Value::TYPE_LIST))
-    return false;
-  const base::ListValue* list = static_cast<const base::ListValue*>(&value);
-
-  std::vector<std::string> local_vector;
-  for (base::ListValue::const_iterator it = list->begin();
-       it != list->end(); ++it) {
-    std::string string_value;
-    if (!(*it)->GetAsString(&string_value))
-      return false;
-
-    local_vector.push_back(string_value);
-  }
-
-  string_vector->swap(local_vector);
-  return true;
-}
-
-}  // namespace subtle
-
-template <>
-void PrefMember<bool>::UpdatePref(const bool& value) {
-  prefs()->SetBoolean(pref_name(), value);
-}
-
-template <>
-bool PrefMember<bool>::Internal::UpdateValueInternal(
-    const base::Value& value) const {
-  return value.GetAsBoolean(&value_);
-}
-
-template <>
-void PrefMember<int>::UpdatePref(const int& value) {
-  prefs()->SetInteger(pref_name(), value);
-}
-
-template <>
-bool PrefMember<int>::Internal::UpdateValueInternal(
-    const base::Value& value) const {
-  return value.GetAsInteger(&value_);
-}
-
-template <>
-void PrefMember<double>::UpdatePref(const double& value) {
-  prefs()->SetDouble(pref_name(), value);
-}
-
-template <>
-bool PrefMember<double>::Internal::UpdateValueInternal(const base::Value& value)
-    const {
-  return value.GetAsDouble(&value_);
-}
-
-template <>
-void PrefMember<std::string>::UpdatePref(const std::string& value) {
-  prefs()->SetString(pref_name(), value);
-}
-
-template <>
-bool PrefMember<std::string>::Internal::UpdateValueInternal(
-    const base::Value& value)
-    const {
-  return value.GetAsString(&value_);
-}
-
-template <>
-void PrefMember<base::FilePath>::UpdatePref(const base::FilePath& value) {
-  prefs()->SetFilePath(pref_name(), value);
-}
-
-template <>
-bool PrefMember<base::FilePath>::Internal::UpdateValueInternal(
-    const base::Value& value)
-    const {
-  return base::GetValueAsFilePath(value, &value_);
-}
-
-template <>
-void PrefMember<std::vector<std::string> >::UpdatePref(
-    const std::vector<std::string>& value) {
-  base::ListValue list_value;
-  list_value.AppendStrings(value);
-  prefs()->Set(pref_name(), list_value);
-}
-
-template <>
-bool PrefMember<std::vector<std::string> >::Internal::UpdateValueInternal(
-    const base::Value& value) const {
-  return subtle::PrefMemberVectorStringUpdate(value, &value_);
-}