ChromeOS: implement per-user time zone preferences.

chrome/browser/chromeos/extensions/info_private_apitest.cc

Index: chrome/browser/chromeos/extensions/info_private_apitest.cc
diff --git a/chrome/browser/chromeos/extensions/info_private_apitest.cc b/chrome/browser/chromeos/extensions/info_private_apitest.cc
index 12c568ef1f3663530d70bc56c24c4cd392318016..c3c88b1916fb8e0b307867fcdfb27aeacd5dba55 100644
--- a/chrome/browser/chromeos/extensions/info_private_apitest.cc
+++ b/chrome/browser/chromeos/extensions/info_private_apitest.cc
@@ -44,9 +44,7 @@ class ChromeOSInfoPrivateTest : public ExtensionApiTest {
 IN_PROC_BROWSER_TEST_F(ChromeOSInfoPrivateTest, TestGetAndSet) {
   // Set the initial timezone different from what JS function
   // timezoneSetTest() will attempt to set.
-  base::Value initial_timezone("America/Los_Angeles");
-  chromeos::CrosSettings::Get()->Set(chromeos::kSystemTimezone,
-                                     initial_timezone);
+  profile()->GetPrefs()->SetString(prefs::kUserTimezone, "America/Los_Angeles");
 
   // Check that accessibility settings are set to default values.
   PrefService* prefs = profile()->GetPrefs();