Policy providers all get a SchemaRegistry to work with.

chrome/browser/chromeos/policy/login_profile_policy_provider.h

 // Copyright 2013 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_CHROMEOS_POLICY_LOGIN_PROFILE_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_LOGIN_PROFILE_POLICY_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/policy/configuration_policy_provider.h"
 #include "chrome/browser/policy/policy_service.h"
 
 namespace policy {
 
 // Policy provider for the login profile. Since the login profile is not
 // associated with any user, it does not receive regular user policy. However,
 // several device policies that control features on the login screen surface as
 // user policies in the login profile.
 class LoginProfilePolicyProvider : public ConfigurationPolicyProvider,
                                    public PolicyService::Observer {
  public:
   explicit LoginProfilePolicyProvider(PolicyService* device_policy_service);
   virtual ~LoginProfilePolicyProvider();
 
   // ConfigurationPolicyProvider:
-  virtual void Init() OVERRIDE;
+  virtual void Init(SchemaRegistry* registry) OVERRIDE;
   virtual void Shutdown() OVERRIDE;
   virtual void RefreshPolicies() OVERRIDE;
 
   // PolicyService::Observer:
   virtual void OnPolicyUpdated(const PolicyNamespace& ns,
                                const PolicyMap& previous,
                                const PolicyMap& current) OVERRIDE;
   virtual void OnPolicyServiceInitialized(PolicyDomain domain) OVERRIDE;
 
   void OnDevicePolicyRefreshDone();
 
  private:
   void UpdateFromDevicePolicy();
 
   PolicyService* device_policy_service_;  // Not owned.
 
   bool waiting_for_device_policy_refresh_;
 
   base::WeakPtrFactory<LoginProfilePolicyProvider> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginProfilePolicyProvider);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_LOGIN_PROFILE_POLICY_PROVIDER_H_