Move preference MACs to the protected preference stores.

chrome/browser/prefs/tracked/pref_store_hash_store_contents.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/prefs/tracked/pref_store_hash_store_contents.h"
+
+#include "base/callback.h"
+#include "base/logging.h"
+#include "base/prefs/persistent_pref_store.h"
+#include "base/values.h"
+#include "chrome/common/pref_names.h"
+#include "components/pref_registry/pref_registry_syncable.h"
+
+namespace {
+
+class PrefStoreMutableDictionary : public HashStoreContents::MutableDictionary {
+ public:
+  PrefStoreMutableDictionary(const std::string& key,
+                             WriteablePrefStore* pref_store);
+  virtual ~PrefStoreMutableDictionary();
+
+  // MutableDictionary implementation
+  virtual base::DictionaryValue* operator->() OVERRIDE;
+
+ private:
+  const std::string key_;
+  WriteablePrefStore* pref_store_;
+  scoped_ptr<base::DictionaryValue> mutable_dictionary_;
+};
+
+PrefStoreMutableDictionary::PrefStoreMutableDictionary(
+    const std::string& key,
+    WriteablePrefStore* pref_store)
+    : key_(key), pref_store_(pref_store) {
+}
+
+PrefStoreMutableDictionary::~PrefStoreMutableDictionary() {
+  pref_store_->ReportValueChanged(key_);
+}
+
+base::DictionaryValue* PrefStoreMutableDictionary::operator->() {
+  base::DictionaryValue* mac_dictionary = NULL;
+  base::Value* mac_dictionary_value = NULL;
+
+  if (pref_store_->GetMutableValue(key_, &mac_dictionary_value))
+    mac_dictionary_value->GetAsDictionary(&mac_dictionary);
+
+  if (!mac_dictionary) {
+    mac_dictionary = new base::DictionaryValue;
+    pref_store_->SetValue(key_, mac_dictionary);
+  }
+
+  return mac_dictionary;
+}
+
+const base::DictionaryValue* GetMacDictionary(
+    const WriteablePrefStore* pref_store) {
+  const base::DictionaryValue* mac_dictionary = NULL;
+  const base::Value* mac_dictionary_value = NULL;
+  if (pref_store->GetValue(prefs::kProfilePreferenceHashes,
+                           &mac_dictionary_value))
+    mac_dictionary_value->GetAsDictionary(&mac_dictionary);
+  return mac_dictionary;
+}
+
+}  // namespace
+
+// static
+const char PrefStoreHashStoreContents::kSuperMacPref[] = "super_mac";
+
+PrefStoreHashStoreContents::PrefStoreHashStoreContents(
+    PersistentPrefStore* pref_store)
+    : pref_store_(pref_store), persistent_pref_store_(NULL) {
+}
+
+PrefStoreHashStoreContents::PrefStoreHashStoreContents(
+    WriteablePrefStore* pref_store)
+    : pref_store_(pref_store), persistent_pref_store_(NULL) {
+}
+
+// static
+void PrefStoreHashStoreContents::RegisterProfilePrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterDictionaryPref(
+      prefs::kProfilePreferenceHashes,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(
+      kSuperMacPref,
+      std::string(),
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+}
+
+std::string PrefStoreHashStoreContents::hash_store_id() const {
+  return "";
+}
+
+void PrefStoreHashStoreContents::Reset() {
+  pref_store_->RemoveValue(prefs::kProfilePreferenceHashes);
+}
+
+bool PrefStoreHashStoreContents::IsInitialized() const {
+  return pref_store_->GetValue(prefs::kProfilePreferenceHashes, NULL);
+}
+
+const base::DictionaryValue* PrefStoreHashStoreContents::GetContents() const {
+  return GetMacDictionary(pref_store_);
+}
+
+scoped_ptr<HashStoreContents::MutableDictionary>
+PrefStoreHashStoreContents::GetMutableContents() {
+  return scoped_ptr<MutableDictionary>(new PrefStoreMutableDictionary(
+      prefs::kProfilePreferenceHashes, pref_store_));
+}
+
+std::string PrefStoreHashStoreContents::GetSuperMac() const {
+  std::string super_mac_string;
+  const base::Value* super_mac_value = NULL;
+  if (pref_store_->GetValue(kSuperMacPref, &super_mac_value))
+    super_mac_value->GetAsString(&super_mac_string);
+  return super_mac_string;
+}
+
+void PrefStoreHashStoreContents::SetSuperMac(const std::string& super_mac) {
+  pref_store_->SetValue(kSuperMacPref, new base::StringValue(super_mac));
+}
+
+void PrefStoreHashStoreContents::CommitPendingWrite() {
+  if (persistent_pref_store_)
+    persistent_pref_store_->CommitPendingWrite();
+}