ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 1fb18e97dbd3ada97d976803f9fd052d1d795a96..43de89d014a89515cc03bd9dd0e55ce485edd87d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -485,6 +485,11 @@ const char kTouchpadSensitivity[] = "settings.touchpad.sensitivity2";
 // A boolean pref set to true if time should be displayed in 24-hour clock.
 const char kUse24HourClock[] = "settings.clock.use_24hour_clock";
 
+// This setting disables manual timezone selection and starts periodic timezone
+// refresh.
+const char kResolveTimezoneByGeolocation[] =
+    "settings.resolve_timezone_by_geolocation";
+
 // A boolean pref to disable Google Drive integration.
 // The pref prefix should remain as "gdata" for backward compatibility.
 const char kDisableDrive[] = "gdata.disabled";
@@ -1956,6 +1961,14 @@ const char kMessageCenterShowIcon[] = "message_center.show_icon";
 const char kMessageCenterForcedOnTaskbar[] =
     "message_center.was_forced_on_taskbar";
 
+#if defined(OS_CHROMEOS)
+// This setting starts periodic timezone refresh when not in user session.
+// (user session is controlled by user profile preference
+// kResolveTimezoneByGeolocation
+const char kResolveDeviceTimezoneByGeolocation[] =
+    "settings.resolve_device_timezone_by_geolocation";
+#endif  // defined(OS_CHROMEOS)
+
 // *************** SERVICE PREFS ***************
 // These are attached to the service process.