ChromeOS: Add SystemTimezoneAutomaticDetection policy.

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

Index: chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
diff --git a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
index a11c9c7beeefd02d3baf80316f28aeb8a443aaa0..48498913145e961a20bb3cdd3949559b4379ebd9 100644
--- a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
+++ b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
@@ -687,6 +687,19 @@ message AllowBluetoothProto {
   optional bool allow_bluetooth = 1 [default = true];
 }
 
+message SystemTimezoneAutomaticDetectionProto {
+  // This allows domain administrators to control the timezone settings for
+  // their devices.
+  enum AutomaticTimezoneDetectionType {
+    AUTOMATIC_TIMEZONE_DETECTION_USERS_DECIDE = 0;
+    AUTOMATIC_TIMEZONE_DETECTION_DISABLED = 1;
+    AUTOMATIC_TIMEZONE_DETECTION_IP_ONLY = 2;
+    AUTOMATIC_TIMEZONE_DETECTION_SEND_WIFI_ACCESS_POINTS = 3;
+  };
+
+  optional AutomaticTimezoneDetectionType timezone_detection_type = 1;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -736,4 +749,6 @@ message ChromeDeviceSettingsProto {
   optional LoginAuthenticationBehaviorProto login_authentication_behavior = 41;
   optional UsbDetachableWhitelistProto usb_detachable_whitelist = 42;
   optional AllowBluetoothProto allow_bluetooth = 43;
+  optional SystemTimezoneAutomaticDetectionProto
+      system_timezone_automatic_detection = 44;
 }