Added a timezone policy and pyauto tests for it.

chrome/browser/chromeos/settings/cros_settings_names.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/settings/cros_settings_names.h"
 
 namespace chromeos {
 
 const char kCrosSettingsPrefix[] = "cros.";
 
 // All cros.accounts.* settings are stored in SignedSettings.
 const char kAccountsPrefAllowGuest[] = "cros.accounts.allowBWSI";
 const char kAccountsPrefAllowNewUser[] = "cros.accounts.allowGuest";
 const char kAccountsPrefShowUserNamesOnSignIn[]
     = "cros.accounts.showUserNamesOnSignIn";
 const char kAccountsPrefUsers[] = "cros.accounts.users";
 const char kAccountsPrefEphemeralUsersEnabled[] =
     "cros.accounts.ephemeralUsersEnabled";
 
 // Name of signed setting persisted on device, writeable only by owner.
 const char kSettingProxyEverywhere[] = "cros.proxy.everywhere";
 
 // All cros.signed.* settings are stored in SignedSettings.
 const char kSignedDataRoamingEnabled[] = "cros.signed.data_roaming_enabled";
 
+// The first constant refers to the user setting editable in the UI.  The second
+// refers to the timezone policy. These are currently separated because the
+// policy stack for device settings does not support the required behavior (see
+// the description in policy_templates.json).
 const char kSystemTimezone[] = "cros.system.timezone";
+const char kSystemTimezonePolicy[] = "cros.system.timezone_policy";
 
 const char kDeviceOwner[] = "cros.device.owner";
 
 const char kStatsReportingPref[] = "cros.metrics.reportingEnabled";
 
 const char kReleaseChannel[] = "cros.system.releaseChannel";
 const char kReleaseChannelDelegated[] = "cros.system.releaseChannelDelegated";
 
 // A boolean pref that indicates whether OS & firmware version info should be
 // reported along with device policy requests.
@@ skipping 33 matching lines @@
 
 // Defines the set of URLs to be opened on login to the anonymous account used
 // if the device is in KIOSK mode.
 const char kStartUpUrls[] = "cros.start_up_urls";
 
 // This policy should not appear in the protobuf ever but is used internally to
 // signal that we are running in a "safe-mode" for policy recovery.
 const char kPolicyMissingMitigationMode[] =
     "cros.internal.policy_mitigation_mode";
 }  // namespace chromeos