UserPolicyCache only becomes ready after policy has been fetched.

chrome/browser/policy/device_policy_cache.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_
 #pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/signed_settings.h"
@@ skipping 15 matching lines @@
                           public chromeos::SignedSettingsHelper::Callback {
  public:
   DevicePolicyCache(CloudPolicyDataStore* data_store,
                     EnterpriseInstallAttributes* install_attributes);
   virtual ~DevicePolicyCache();
 
   // CloudPolicyCacheBase implementation:
   virtual void Load() OVERRIDE;
   virtual void SetPolicy(const em::PolicyFetchResponse& policy) OVERRIDE;
   virtual void SetUnmanaged() OVERRIDE;
+  virtual void SetFetchingDone() OVERRIDE;
 
   // SignedSettingsHelper::Callback implementation:
   virtual void OnRetrievePolicyCompleted(
       chromeos::SignedSettings::ReturnCode code,
       const em::PolicyFetchResponse& policy) OVERRIDE;
 
  private:
   friend class DevicePolicyCacheTest;
   friend class DevicePolicyCacheTestHelper;
 
@@ skipping 31 matching lines @@
   chromeos::SignedSettingsHelper* signed_settings_helper_;
 
   base::WeakPtrFactory<DevicePolicyCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DevicePolicyCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_