ChromeOS: Add SystemTimezoneAutomaticDetection policy.

chrome/browser/chromeos/preferences.h

Index: chrome/browser/chromeos/preferences.h
diff --git a/chrome/browser/chromeos/preferences.h b/chrome/browser/chromeos/preferences.h
index 1a0e8fb326162ba8da10a7a76ceeb3d6ebd593ab..34ad8a353b95d98e0c5530326234523a05f2f83e 100644
--- a/chrome/browser/chromeos/preferences.h
+++ b/chrome/browser/chromeos/preferences.h
@@ -38,6 +38,17 @@ class InputMethodManager;
 class InputMethodSyncer;
 }
 
+// This is a set of possible values of SystemTimezoneAutomaticDetection device
+// policy. It should be kept in sync with enum AutomaticTimezoneDetectionType
+// in chrome_device_policy.proto .
+enum ResolveDeviceTimezoneByGeolocationPolicyValues {
+  USERS_DECIDE = 0,
+  DISABLED = 1,
+  IP_ONLY = 2,
+  SEND_WIFI_ACCESS_POINTS = 3,
+  NUM_ELEMENTS
+};
+
 // The Preferences class handles Chrome OS preferences. When the class
 // is first initialized, it will initialize the OS settings to what's stored in
 // the preferences. These include touchpad settings, etc.