Revert "ChromeOS: Add SystemTimezoneAutomaticDetection policy."

chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/policy/device_policy_decoder_chromeos.h"
 
 #include <limits>
 #include <string>
 
 #include "base/callback.h"
@@ skipping 688 matching lines @@
   if (policy.has_system_timezone()) {
     if (policy.system_timezone().has_timezone()) {
       policies->Set(key::kSystemTimezone,
                     POLICY_LEVEL_MANDATORY,
                     POLICY_SCOPE_MACHINE,
                     POLICY_SOURCE_CLOUD,
                     new base::StringValue(
                         policy.system_timezone().timezone()),
                     NULL);
     }
-
-    if (policy.system_timezone().has_timezone_detection_type()) {
-      scoped_ptr<base::Value> value(DecodeIntegerValue(
-          policy.system_timezone().timezone_detection_type()));
-      if (value) {
-        policies->Set(key::kSystemTimezoneAutomaticDetection,
-                      POLICY_LEVEL_MANDATORY,
-                      POLICY_SCOPE_MACHINE,
-                      POLICY_SOURCE_CLOUD,
-                      value.release(),
-                      nullptr);
-      }
-    }
   }
 
   if (policy.has_use_24hour_clock()) {
     if (policy.use_24hour_clock().has_use_24hour_clock()) {
       policies->Set(key::kSystemUse24HourClock,
                     POLICY_LEVEL_MANDATORY,
                     POLICY_SCOPE_MACHINE,
                     POLICY_SOURCE_CLOUD,
                     new base::FundamentalValue(
                         policy.use_24hour_clock().use_24hour_clock()),
@@ skipping 172 matching lines @@
   // Decode the various groups of policies.
   DecodeLoginPolicies(policy, policies);
   DecodeNetworkPolicies(policy, policies);
   DecodeReportingPolicies(policy, policies);
   DecodeAutoUpdatePolicies(policy, policies);
   DecodeAccessibilityPolicies(policy, policies);
   DecodeGenericPolicies(policy, policies);
 }
 
 }  // namespace policy