Added support for signed policy blobs on desktop.

chrome/browser/chromeos/policy/device_local_account_policy_store.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_local_account_policy_store.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/values.h"
 #include "chromeos/dbus/power_policy_controller.h"
@@ skipping 172 matching lines @@
   // The timestamp is verified when storing a new policy downloaded from the
   // server but not when loading a cached policy from disk.
   // See SessionManagerOperation::ValidateDeviceSettings for the rationale.
   validator->ValidateAgainstCurrentPolicy(
       policy(),
       valid_timestamp_required
           ? CloudPolicyValidatorBase::TIMESTAMP_REQUIRED
           : CloudPolicyValidatorBase::TIMESTAMP_NOT_REQUIRED,
       CloudPolicyValidatorBase::DM_TOKEN_REQUIRED);
   validator->ValidatePayload();
-  validator->ValidateSignature(*key->public_key(), false);
+  validator->ValidateSignature(key->public_key_as_string(),
+                               GetPolicyVerificationKey(),
+                               std::string(),
+                               false);
   validator.release()->StartValidation(callback);
 }
 
 }  // namespace policy