Get rid of use of CreateStringValue in chromeos/ directory.

chrome/browser/chromeos/settings/system_settings_provider.cc

Index: chrome/browser/chromeos/settings/system_settings_provider.cc
diff --git a/chrome/browser/chromeos/settings/system_settings_provider.cc b/chrome/browser/chromeos/settings/system_settings_provider.cc
index 75a865629b62c904920ac16f05a167e863d8bb60..54e873e61528dbff158eef93930eaebe30e1dab5 100644
--- a/chrome/browser/chromeos/settings/system_settings_provider.cc
+++ b/chrome/browser/chromeos/settings/system_settings_provider.cc
@@ -21,7 +21,7 @@ SystemSettingsProvider::SystemSettingsProvider(
   system::TimezoneSettings *timezone_settings =
       system::TimezoneSettings::GetInstance();
   timezone_settings->AddObserver(this);
-  timezone_value_.reset(base::Value::CreateStringValue(
+  timezone_value_.reset(new base::StringValue(
       timezone_settings->GetCurrentTimezoneID()));
 }
 
@@ -62,7 +62,7 @@ bool SystemSettingsProvider::HandlesSetting(const std::string& path) const {
 
 void SystemSettingsProvider::TimezoneChanged(const icu::TimeZone& timezone) {
   // Fires system setting change notification.
-  timezone_value_.reset(base::Value::CreateStringValue(
+  timezone_value_.reset(new base::StringValue(
       system::TimezoneSettings::GetTimezoneID(timezone)));
   NotifyObservers(kSystemTimezone);
 }