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|
// 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 "chrome/browser/content_settings/content_settings_pref_provider.h"
#include <map>
#include <string>
#include <utility>
#include "base/auto_reset.h"
#include "base/command_line.h"
#include "base/memory/scoped_ptr.h"
#include "base/metrics/histogram.h"
#include "chrome/browser/content_settings/content_settings_rule.h"
#include "chrome/browser/content_settings/content_settings_utils.h"
#include "chrome/browser/content_settings/host_content_settings_map.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/prefs/scoped_user_pref_update.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/content_settings.h"
#include "chrome/common/content_settings_pattern.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/user_metrics.h"
#include "googleurl/src/gurl.h"
using content::BrowserThread;
using content::UserMetricsAction;
namespace {
typedef std::pair<std::string, std::string> StringPair;
typedef std::map<std::string, std::string> StringMap;
const char kPerPluginPrefName[] = "per_plugin";
ContentSetting FixObsoleteCookiePromptMode(ContentSettingsType content_type,
ContentSetting setting) {
if (content_type == CONTENT_SETTINGS_TYPE_COOKIES &&
setting == CONTENT_SETTING_ASK) {
return CONTENT_SETTING_BLOCK;
}
return setting;
}
// If the given content type supports resource identifiers in user preferences,
// returns true and sets |pref_key| to the key in the content settings
// dictionary under which per-resource content settings are stored.
// Otherwise, returns false.
bool GetResourceTypeName(ContentSettingsType content_type,
std::string* pref_key) {
if (content_type == CONTENT_SETTINGS_TYPE_PLUGINS) {
*pref_key = kPerPluginPrefName;
return true;
}
return false;
}
} // namespace
namespace content_settings {
// ////////////////////////////////////////////////////////////////////////////
// PrefProvider:
//
// static
void PrefProvider::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterIntegerPref(
prefs::kContentSettingsVersion,
ContentSettingsPattern::kContentSettingsPatternVersion,
PrefService::UNSYNCABLE_PREF);
prefs->RegisterDictionaryPref(prefs::kContentSettingsPatternPairs,
PrefService::SYNCABLE_PREF);
// Obsolete prefs, for migration:
prefs->RegisterDictionaryPref(prefs::kGeolocationContentSettings,
PrefService::UNSYNCABLE_PREF);
prefs->RegisterDictionaryPref(prefs::kContentSettingsPatterns,
PrefService::UNSYNCABLE_PREF);
prefs->RegisterListPref(prefs::kDesktopNotificationAllowedOrigins,
PrefService::UNSYNCABLE_PREF);
prefs->RegisterListPref(prefs::kDesktopNotificationDeniedOrigins,
PrefService::UNSYNCABLE_PREF);
}
PrefProvider::PrefProvider(PrefService* prefs,
bool incognito)
: prefs_(prefs),
is_incognito_(incognito),
updating_preferences_(false) {
DCHECK(prefs_);
if (!is_incognito_) {
// Migrate obsolete preferences.
MigrateObsoleteContentSettingsPatternPref();
MigrateObsoleteGeolocationPref();
MigrateObsoleteNotificationsPrefs();
}
// Verify preferences version.
if (!prefs_->HasPrefPath(prefs::kContentSettingsVersion)) {
prefs_->SetInteger(prefs::kContentSettingsVersion,
ContentSettingsPattern::kContentSettingsPatternVersion);
}
if (prefs_->GetInteger(prefs::kContentSettingsVersion) >
ContentSettingsPattern::kContentSettingsPatternVersion) {
return;
}
// Read content settings exceptions.
ReadContentSettingsFromPref(false);
if (!is_incognito_) {
UMA_HISTOGRAM_COUNTS("ContentSettings.NumberOfExceptions",
value_map_.size());
}
pref_change_registrar_.Init(prefs_);
pref_change_registrar_.Add(prefs::kContentSettingsPatternPairs, this);
}
bool PrefProvider::SetWebsiteSetting(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
Value* in_value) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(prefs_);
// Default settings are set using a wildcard pattern for both
// |primary_pattern| and |secondary_pattern|. Don't store default settings in
// the |PrefProvider|. The |PrefProvider| handles settings for specific
// sites/origins defined by the |primary_pattern| and the |secondary_pattern|.
// Default settings are handled by the |DefaultProvider|.
if (primary_pattern == ContentSettingsPattern::Wildcard() &&
secondary_pattern == ContentSettingsPattern::Wildcard() &&
resource_identifier.empty()) {
return false;
}
// At this point take the ownership of the |in_value|.
scoped_ptr<base::Value> value(in_value);
// Update in memory value map.
OriginIdentifierValueMap* map_to_modify = &incognito_value_map_;
if (!is_incognito_)
map_to_modify = &value_map_;
{
base::AutoLock auto_lock(lock_);
if (value.get()) {
map_to_modify->SetValue(
primary_pattern,
secondary_pattern,
content_type,
resource_identifier,
value->DeepCopy());
} else {
map_to_modify->DeleteValue(
primary_pattern,
secondary_pattern,
content_type,
resource_identifier);
}
}
// Update the content settings preference.
if (!is_incognito_) {
UpdatePref(primary_pattern,
secondary_pattern,
content_type,
resource_identifier,
value.get());
}
NotifyObservers(
primary_pattern, secondary_pattern, content_type, resource_identifier);
return true;
}
void PrefProvider::ClearAllContentSettingsRules(
ContentSettingsType content_type) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(prefs_);
OriginIdentifierValueMap* map_to_modify = &incognito_value_map_;
if (!is_incognito_)
map_to_modify = &value_map_;
std::vector<Rule> rules_to_delete;
{
base::AutoLock auto_lock(lock_);
scoped_ptr<RuleIterator> rule_iterator(
map_to_modify->GetRuleIterator(content_type, "", NULL));
// Copy the rules; we cannot call |UpdatePref| while holding |lock_|.
while (rule_iterator->HasNext())
rules_to_delete.push_back(rule_iterator->Next());
map_to_modify->DeleteValues(content_type, "");
}
for (std::vector<Rule>::const_iterator it = rules_to_delete.begin();
it != rules_to_delete.end(); ++it) {
UpdatePref(
it->primary_pattern,
it->secondary_pattern,
content_type,
"",
NULL);
}
NotifyObservers(ContentSettingsPattern(),
ContentSettingsPattern(),
content_type,
std::string());
}
void PrefProvider::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (type == chrome::NOTIFICATION_PREF_CHANGED) {
DCHECK_EQ(prefs_, content::Source<PrefService>(source).ptr());
if (updating_preferences_)
return;
std::string* name = content::Details<std::string>(details).ptr();
if (*name != prefs::kContentSettingsPatternPairs) {
NOTREACHED() << "Unexpected preference observed";
return;
}
ReadContentSettingsFromPref(true);
NotifyObservers(ContentSettingsPattern(),
ContentSettingsPattern(),
CONTENT_SETTINGS_TYPE_DEFAULT,
std::string());
} else {
NOTREACHED() << "Unexpected notification";
}
}
PrefProvider::~PrefProvider() {
DCHECK(!prefs_);
}
RuleIterator* PrefProvider::GetRuleIterator(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
bool incognito) const {
if (incognito)
return incognito_value_map_.GetRuleIterator(content_type,
resource_identifier,
&lock_);
return value_map_.GetRuleIterator(content_type, resource_identifier, &lock_);
}
// ////////////////////////////////////////////////////////////////////////////
// Private
void PrefProvider::UpdatePref(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
const base::Value* value) {
// Ensure that |lock_| is not held by this thread, since this function will
// send out notifications (by |~DictionaryPrefUpdate|).
AssertLockNotHeld();
AutoReset<bool> auto_reset(&updating_preferences_, true);
{
DictionaryPrefUpdate update(prefs_,
prefs::kContentSettingsPatternPairs);
DictionaryValue* pattern_pairs_settings = update.Get();
UpdatePatternPairsSettings(primary_pattern,
secondary_pattern,
content_type,
resource_identifier,
value,
pattern_pairs_settings);
}
}
void PrefProvider::ReadContentSettingsFromPref(bool overwrite) {
// |DictionaryPrefUpdate| sends out notifications when destructed. This
// construction order ensures |AutoLock| gets destroyed first and |lock_| is
// not held when the notifications are sent. Also, |auto_reset| must be still
// valid when the notifications are sent, so that |Observe| skips the
// notification.
AutoReset<bool> auto_reset(&updating_preferences_, true);
DictionaryPrefUpdate update(prefs_, prefs::kContentSettingsPatternPairs);
base::AutoLock auto_lock(lock_);
const DictionaryValue* all_settings_dictionary =
prefs_->GetDictionary(prefs::kContentSettingsPatternPairs);
if (overwrite)
value_map_.clear();
// Careful: The returned value could be NULL if the pref has never been set.
if (!all_settings_dictionary)
return;
DictionaryValue* mutable_settings;
scoped_ptr<DictionaryValue> mutable_settings_scope;
if (!is_incognito_) {
mutable_settings = update.Get();
} else {
// Create copy as we do not want to persist anything in OTR prefs.
mutable_settings = all_settings_dictionary->DeepCopy();
mutable_settings_scope.reset(mutable_settings);
}
// Convert all Unicode patterns into punycode form, then read.
CanonicalizeContentSettingsExceptions(mutable_settings);
for (DictionaryValue::key_iterator i(mutable_settings->begin_keys());
i != mutable_settings->end_keys(); ++i) {
const std::string& pattern_str(*i);
std::pair<ContentSettingsPattern, ContentSettingsPattern> pattern_pair =
ParsePatternString(pattern_str);
if (!pattern_pair.first.IsValid() ||
!pattern_pair.second.IsValid()) {
LOG(DFATAL) << "Invalid pattern strings: " << pattern_str;
continue;
}
// Get settings dictionary for the current pattern string, and read
// settings from the dictionary.
DictionaryValue* settings_dictionary = NULL;
bool found = mutable_settings->GetDictionaryWithoutPathExpansion(
pattern_str, &settings_dictionary);
DCHECK(found);
for (size_t i = 0; i < CONTENT_SETTINGS_NUM_TYPES; ++i) {
ContentSettingsType content_type = static_cast<ContentSettingsType>(i);
std::string res_dictionary_path;
if (GetResourceTypeName(content_type, &res_dictionary_path)) {
DictionaryValue* resource_dictionary = NULL;
if (settings_dictionary->GetDictionary(
res_dictionary_path, &resource_dictionary)) {
for (DictionaryValue::key_iterator j(
resource_dictionary->begin_keys());
j != resource_dictionary->end_keys();
++j) {
const std::string& resource_identifier(*j);
int setting = CONTENT_SETTING_DEFAULT;
found = resource_dictionary->GetIntegerWithoutPathExpansion(
resource_identifier, &setting);
DCHECK_NE(CONTENT_SETTING_DEFAULT, setting);
value_map_.SetValue(pattern_pair.first,
pattern_pair.second,
content_type,
resource_identifier,
Value::CreateIntegerValue(setting));
}
}
}
Value* value = NULL;
if (HostContentSettingsMap::ContentTypeHasCompoundValue(content_type)) {
DictionaryValue* setting = NULL;
// TODO(xians): Handle the non-dictionary types.
if (settings_dictionary->GetDictionaryWithoutPathExpansion(
GetTypeName(ContentSettingsType(i)), &setting)) {
DCHECK(!setting->empty());
value = setting->DeepCopy();
}
} else {
int setting = CONTENT_SETTING_DEFAULT;
if (settings_dictionary->GetIntegerWithoutPathExpansion(
GetTypeName(ContentSettingsType(i)), &setting)) {
DCHECK_NE(CONTENT_SETTING_DEFAULT, setting);
setting = FixObsoleteCookiePromptMode(content_type,
ContentSetting(setting));
value = Value::CreateIntegerValue(setting);
}
}
// |value_map_| will take the ownership of |value|.
if (value != NULL) {
value_map_.SetValue(pattern_pair.first,
pattern_pair.second,
content_type,
ResourceIdentifier(""),
value);
}
}
}
}
void PrefProvider::UpdatePatternPairsSettings(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
const base::Value* value,
DictionaryValue* pattern_pairs_settings) {
// Get settings dictionary for the given patterns.
std::string pattern_str(CreatePatternString(primary_pattern,
secondary_pattern));
DictionaryValue* settings_dictionary = NULL;
bool found = pattern_pairs_settings->GetDictionaryWithoutPathExpansion(
pattern_str, &settings_dictionary);
if (!found && value) {
settings_dictionary = new DictionaryValue;
pattern_pairs_settings->SetWithoutPathExpansion(
pattern_str, settings_dictionary);
}
if (settings_dictionary) {
std::string res_dictionary_path;
if (GetResourceTypeName(content_type, &res_dictionary_path) &&
!resource_identifier.empty()) {
DictionaryValue* resource_dictionary = NULL;
found = settings_dictionary->GetDictionary(
res_dictionary_path, &resource_dictionary);
if (!found) {
if (value == NULL)
return; // Nothing to remove. Exit early.
resource_dictionary = new DictionaryValue;
settings_dictionary->Set(res_dictionary_path, resource_dictionary);
}
// Update resource dictionary.
if (value == NULL) {
resource_dictionary->RemoveWithoutPathExpansion(resource_identifier,
NULL);
if (resource_dictionary->empty()) {
settings_dictionary->RemoveWithoutPathExpansion(
res_dictionary_path, NULL);
}
} else {
resource_dictionary->SetWithoutPathExpansion(
resource_identifier, value->DeepCopy());
}
} else {
// Update settings dictionary.
std::string setting_path = GetTypeName(content_type);
if (value == NULL) {
settings_dictionary->RemoveWithoutPathExpansion(setting_path,
NULL);
} else {
settings_dictionary->SetWithoutPathExpansion(
setting_path, value->DeepCopy());
}
}
// Remove the settings dictionary if it is empty.
if (settings_dictionary->empty()) {
pattern_pairs_settings->RemoveWithoutPathExpansion(
pattern_str, NULL);
}
}
}
// static
void PrefProvider::CanonicalizeContentSettingsExceptions(
DictionaryValue* all_settings_dictionary) {
DCHECK(all_settings_dictionary);
std::vector<std::string> remove_items;
std::vector<std::pair<std::string, std::string> > move_items;
for (DictionaryValue::key_iterator i(all_settings_dictionary->begin_keys());
i != all_settings_dictionary->end_keys(); ++i) {
const std::string& pattern_str(*i);
std::pair<ContentSettingsPattern, ContentSettingsPattern> pattern_pair =
ParsePatternString(pattern_str);
if (!pattern_pair.first.IsValid() ||
!pattern_pair.second.IsValid()) {
LOG(ERROR) << "Invalid pattern strings: " << pattern_str;
continue;
}
const std::string canonicalized_pattern_str = CreatePatternString(
pattern_pair.first, pattern_pair.second);
if (canonicalized_pattern_str.empty() ||
canonicalized_pattern_str == pattern_str)
continue;
// Clear old pattern if prefs already have canonicalized pattern.
DictionaryValue* new_pattern_settings_dictionary = NULL;
if (all_settings_dictionary->GetDictionaryWithoutPathExpansion(
canonicalized_pattern_str, &new_pattern_settings_dictionary)) {
remove_items.push_back(pattern_str);
continue;
}
// Move old pattern to canonicalized pattern.
DictionaryValue* old_pattern_settings_dictionary = NULL;
if (all_settings_dictionary->GetDictionaryWithoutPathExpansion(
pattern_str, &old_pattern_settings_dictionary)) {
move_items.push_back(
std::make_pair(pattern_str, canonicalized_pattern_str));
}
}
for (size_t i = 0; i < remove_items.size(); ++i) {
all_settings_dictionary->RemoveWithoutPathExpansion(remove_items[i], NULL);
}
for (size_t i = 0; i < move_items.size(); ++i) {
Value* pattern_settings_dictionary = NULL;
all_settings_dictionary->RemoveWithoutPathExpansion(
move_items[i].first, &pattern_settings_dictionary);
all_settings_dictionary->SetWithoutPathExpansion(
move_items[i].second, pattern_settings_dictionary);
}
}
void PrefProvider::ShutdownOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(prefs_);
RemoveAllObservers();
pref_change_registrar_.RemoveAll();
prefs_ = NULL;
}
void PrefProvider::MigrateObsoleteContentSettingsPatternPref() {
// Ensure that |lock_| is not held by this thread, since this function will
// send out notifications (by |~DictionaryPrefUpdate|).
AssertLockNotHeld();
if (!prefs_->HasPrefPath(prefs::kContentSettingsPatterns))
return;
const DictionaryValue* patterns_dictionary =
prefs_->GetDictionary(prefs::kContentSettingsPatterns);
{
DictionaryPrefUpdate update(prefs_, prefs::kContentSettingsPatternPairs);
DictionaryValue* pattern_pairs_dictionary = update.Get();
for (DictionaryValue::key_iterator i(
patterns_dictionary->begin_keys());
i != patterns_dictionary->end_keys();
++i) {
const std::string& key(*i);
// In the past a bug once corrupted dictionary keys. Test if the |key| is
// corrupted and skip a corrupted key. A dictionary |key| can contain two
// content settings patterns, a primary pattern and a secondary pattern.
// If the |key| contains two patterns than they are concataneted with a
// ','.
size_t sep_pos = key.find(",");
ContentSettingsPattern pattern =
ContentSettingsPattern::FromString(key.substr(0, sep_pos));
// Skip the current |key| if the primary |pattern| is invalid.
if (!pattern.IsValid())
continue;
// If the |key| contains a secondary pattern, and the obsolete pref
// dictionary also contains a key that equals the primary |pattern| then
// skip the current |key|.
if (sep_pos != std::string::npos &&
patterns_dictionary->HasKey(pattern.ToString())) {
continue;
}
// Copy the legacy content settings for the current |key| from the
// obsolete pref prefs::kContentSettingsPatterns to the pref
// prefs::kContentSettingsPatternPairs.
DictionaryValue* dictionary = NULL;
bool found = patterns_dictionary->GetDictionaryWithoutPathExpansion(
key, &dictionary);
DCHECK(found);
std::string new_key = CreatePatternString(
pattern, ContentSettingsPattern::Wildcard());
// Existing values are overwritten.
pattern_pairs_dictionary->SetWithoutPathExpansion(
new_key, dictionary->DeepCopy());
}
}
prefs_->ClearPref(prefs::kContentSettingsPatterns);
}
void PrefProvider::MigrateObsoleteGeolocationPref() {
// Ensure that |lock_| is not held by this thread, since this function will
// send out notifications (by |~DictionaryPrefUpdate|).
AssertLockNotHeld();
if (!prefs_->HasPrefPath(prefs::kGeolocationContentSettings))
return;
DictionaryPrefUpdate update(prefs_,
prefs::kContentSettingsPatternPairs);
DictionaryValue* pattern_pairs_settings = update.Get();
const DictionaryValue* geolocation_settings =
prefs_->GetDictionary(prefs::kGeolocationContentSettings);
std::vector<std::pair<std::string, std::string> > corrupted_keys;
for (DictionaryValue::key_iterator i =
geolocation_settings->begin_keys();
i != geolocation_settings->end_keys();
++i) {
const std::string& primary_key(*i);
GURL primary_url(primary_key);
DCHECK(primary_url.is_valid());
DictionaryValue* requesting_origin_settings = NULL;
// The method GetDictionaryWithoutPathExpansion() returns false if the
// value for the given key is not a |DictionaryValue|. If the value for the
// |primary_key| is not a |DictionaryValue| then the location settings for
// this key are corrupted. Therefore they are ignored.
if (!geolocation_settings->GetDictionaryWithoutPathExpansion(
primary_key, &requesting_origin_settings))
continue;
for (DictionaryValue::key_iterator j =
requesting_origin_settings->begin_keys();
j != requesting_origin_settings->end_keys();
++j) {
const std::string& secondary_key(*j);
GURL secondary_url(secondary_key);
// Save corrupted keys to remove them later.
if (!secondary_url.is_valid()) {
corrupted_keys.push_back(std::make_pair(primary_key, secondary_key));
continue;
}
base::Value* value = NULL;
bool found = requesting_origin_settings->GetWithoutPathExpansion(
secondary_key, &value);
DCHECK(found);
ContentSettingsPattern primary_pattern =
ContentSettingsPattern::FromURLNoWildcard(primary_url);
ContentSettingsPattern secondary_pattern =
ContentSettingsPattern::FromURLNoWildcard(secondary_url);
DCHECK(primary_pattern.IsValid() && secondary_pattern.IsValid());
UpdatePatternPairsSettings(primary_pattern,
secondary_pattern,
CONTENT_SETTINGS_TYPE_GEOLOCATION,
std::string(),
value,
pattern_pairs_settings);
}
}
prefs_->ClearPref(prefs::kGeolocationContentSettings);
}
void PrefProvider::MigrateObsoleteNotificationsPrefs() {
// Ensure that |lock_| is not held by this thread, since this function will
// send out notifications (by |~DictionaryPrefUpdate|).
AssertLockNotHeld();
if (!prefs_->HasPrefPath(prefs::kDesktopNotificationAllowedOrigins) &&
!prefs_->HasPrefPath(prefs::kDesktopNotificationDeniedOrigins)) {
return;
}
DictionaryPrefUpdate update(prefs_, prefs::kContentSettingsPatternPairs);
DictionaryValue* pattern_pairs_settings = update.Get();
const ListValue* allowed_origins =
prefs_->GetList(prefs::kDesktopNotificationAllowedOrigins);
for (size_t i = 0; i < allowed_origins->GetSize(); ++i) {
std::string url_string;
bool status = allowed_origins->GetString(i, &url_string);
DCHECK(status);
ContentSettingsPattern primary_pattern =
ContentSettingsPattern::FromURLNoWildcard(GURL(url_string));
DCHECK(primary_pattern.IsValid());
scoped_ptr<base::Value> value(
Value::CreateIntegerValue(CONTENT_SETTING_ALLOW));
UpdatePatternPairsSettings(primary_pattern,
ContentSettingsPattern::Wildcard(),
CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
std::string(),
value.get(),
pattern_pairs_settings);
}
const ListValue* denied_origins =
prefs_->GetList(prefs::kDesktopNotificationDeniedOrigins);
for (size_t i = 0; i < denied_origins->GetSize(); ++i) {
std::string url_string;
bool status = denied_origins->GetString(i, &url_string);
DCHECK(status);
ContentSettingsPattern primary_pattern =
ContentSettingsPattern::FromURLNoWildcard(GURL(url_string));
DCHECK(primary_pattern.IsValid());
scoped_ptr<base::Value> value(
Value::CreateIntegerValue(CONTENT_SETTING_BLOCK));
UpdatePatternPairsSettings(primary_pattern,
ContentSettingsPattern::Wildcard(),
CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
std::string(),
value.get(),
pattern_pairs_settings);
}
prefs_->ClearPref(prefs::kDesktopNotificationAllowedOrigins);
prefs_->ClearPref(prefs::kDesktopNotificationDeniedOrigins);
}
void PrefProvider::AssertLockNotHeld() const {
#if !defined(NDEBUG)
// |Lock::Acquire()| will assert if the lock is held by this thread.
lock_.Acquire();
lock_.Release();
#endif
}
} // namespace content_settings
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