ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 3b7de5acf8b7a2236288b0853e5a6884d22e3ede..b67c1b61452fee10910613eac1bb7aab8c36dc1d 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -179,6 +179,7 @@ extern const char kPrimaryMouseButtonRight[];
 extern const char kMouseSensitivity[];
 extern const char kTouchpadSensitivity[];
 extern const char kUse24HourClock[];
+extern const char kResolveTimezoneByGeolocation[];
 extern const char kDisableDrive[];
 extern const char kDisableDriveOverCellular[];
 extern const char kDisableDriveHostedFiles[];
@@ -727,6 +728,10 @@ extern const char kMessageCenterShowedFirstRunBalloon[];
 extern const char kMessageCenterShowIcon[];
 extern const char kMessageCenterForcedOnTaskbar[];
 
+#if defined(OS_CHROMEOS)
+extern const char kResolveDeviceTimezoneByGeolocation[];
+#endif  // defined(OS_CHROMEOS)
+
 extern const char kAttemptedToEnableAutoupdate[];
 
 extern const char kMediaGalleriesUniqueId[];