UserPolicyCache only becomes ready after policy has been fetched.

chrome/browser/policy/device_policy_cache.cc

 // Copyright (c) 2011 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/policy/device_policy_cache.h"
 
 #include <limits>
 #include <string>
 #include <vector>
 
@@ skipping 173 matching lines @@
       base::Bind(&DevicePolicyCache::PolicyStoreOpCompleted,
                  weak_ptr_factory_.GetWeakPtr());
   new StorePolicyOperation(signed_settings_helper_, policy, callback);
 }
 
 void DevicePolicyCache::SetUnmanaged() {
   LOG(WARNING) << "Tried to set DevicePolicyCache to 'unmanaged'!";
   // This is not supported for DevicePolicyCache.
 }
 
+void DevicePolicyCache::SetFetchingDone() {
+  // Not interesting for device policy cache.
+}
+
 void DevicePolicyCache::OnRetrievePolicyCompleted(
     chromeos::SignedSettings::ReturnCode code,
     const em::PolicyFetchResponse& policy) {
   DCHECK(CalledOnValidThread());
   if (!IsReady()) {
     std::string device_token;
     InstallInitialPolicy(code, policy, &device_token);
     // We need to call SetDeviceToken unconditionally to indicate the cache has
     // finished loading.
     data_store_->SetDeviceToken(device_token, true);
@@ skipping 152 matching lines @@
   if (policy.has_open_network_configuration() &&
       policy.open_network_configuration().has_open_network_configuration()) {
     std::string config(
         policy.open_network_configuration().open_network_configuration());
     mandatory->Set(kPolicyDeviceOpenNetworkConfiguration,
                    Value::CreateStringValue(config));
   }
 }
 
 }  // namespace policy