Delete old policy code after AsyncPolicyLoader refactor.

chrome/browser/policy/asynchronous_policy_provider.h

-// 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.
-
-#ifndef CHROME_BROWSER_POLICY_ASYNCHRONOUS_POLICY_PROVIDER_H_
-#define CHROME_BROWSER_POLICY_ASYNCHRONOUS_POLICY_PROVIDER_H_
-#pragma once
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
-#include "chrome/browser/policy/configuration_policy_provider.h"
-
-namespace policy {
-
-class AsynchronousPolicyLoader;
-class PolicyBundle;
-
-// Policy provider that loads policy asynchronously. Providers should subclass
-// from this class if loading the policy requires disk access or must for some
-// other reason be performed on the file thread. The actual logic for loading
-// policy is handled by a delegate passed at construction time.
-class AsynchronousPolicyProvider
-    : public ConfigurationPolicyProvider,
-      public base::NonThreadSafe {
- public:
-  // Must be implemented by subclasses of the asynchronous policy provider to
-  // provide the implementation details of how policy is loaded.
-  class Delegate {
-   public:
-    virtual ~Delegate() {}
-
-    // Load policy from the delegate's source, and return a PolicyBundle.
-    virtual scoped_ptr<PolicyBundle> Load() = 0;
-  };
-
-  // Assumes ownership of |loader|.
-  AsynchronousPolicyProvider(
-      const PolicyDefinitionList* policy_list,
-      scoped_refptr<AsynchronousPolicyLoader> loader);
-  virtual ~AsynchronousPolicyProvider();
-
-  // ConfigurationPolicyProvider implementation.
-  virtual void RefreshPolicies() OVERRIDE;
-
- private:
-  // Used to trigger a Reload on |loader| on the FILE thread.
-  static void PostReloadOnFileThread(AsynchronousPolicyLoader* loader);
-
-  // Used to notify UI that a reload task has been submitted.
-  void OnReloadPosted();
-
-  // Callback from the loader. This is invoked whenever the loader has completed
-  // a reload of the policies.
-  void OnLoaderReloaded(scoped_ptr<PolicyBundle> bundle);
-
-  // The loader object used internally.
-  scoped_refptr<AsynchronousPolicyLoader> loader_;
-
-  // Number of refreshes requested whose reload is still pending. Used to only
-  // fire notifications when all pending refreshes are done.
-  int pending_refreshes_;
-
-  // Used to post tasks to self on UI.
-  base::WeakPtrFactory<AsynchronousPolicyProvider> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(AsynchronousPolicyProvider);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_ASYNCHRONOUS_POLICY_PROVIDER_H_