Added support for signed policy blobs on desktop.

chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc

Index: chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc b/chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc
index 16468bb595e62e91ed910a72f2f748c0c216225d..a4a2e99f171f6a1494f76cfacc23e8f00b6a93d9 100644
--- a/chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc
+++ b/chrome/browser/chromeos/policy/device_cloud_policy_store_chromeos.cc
@@ -46,7 +46,10 @@ void DeviceCloudPolicyStoreChromeOS::Store(
   }
 
   scoped_ptr<DeviceCloudPolicyValidator> validator(CreateValidator(policy));
-  validator->ValidateSignature(*owner_key->public_key(), true);
+  validator->ValidateSignature(owner_key->public_key_as_string(),
+                               GetPolicyVerificationKey(),
+                               std::string(),
+                               true);
   validator->ValidateAgainstCurrentPolicy(
       device_settings_service_->policy_data(),
       CloudPolicyValidatorBase::TIMESTAMP_REQUIRED,
@@ -74,7 +77,7 @@ void DeviceCloudPolicyStoreChromeOS::InstallInitialPolicy(
   }
 
   scoped_ptr<DeviceCloudPolicyValidator> validator(CreateValidator(policy));
-  validator->ValidateInitialKey();
+  validator->ValidateInitialKey(GetPolicyVerificationKey());
   validator.release()->StartValidation(
       base::Bind(&DeviceCloudPolicyStoreChromeOS::OnPolicyToStoreValidated,
                  weak_factory_.GetWeakPtr()));