Move AsyncPolicyProvider, etc. to components/policy/.

chrome/browser/policy/async_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_ASYNC_POLICY_PROVIDER_H_
-#define CHROME_BROWSER_POLICY_ASYNC_POLICY_PROVIDER_H_
-
-#include "base/cancelable_callback.h"
-#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 "components/policy/core/common/configuration_policy_provider.h"
-
-namespace base {
-class MessageLoopProxy;
-}
-
-namespace policy {
-
-class AsyncPolicyLoader;
-class PolicyBundle;
-class SchemaRegistry;
-
-// A policy provider that loads its policies asynchronously on a background
-// thread. Platform-specific providers are created by passing an implementation
-// of AsyncPolicyLoader to a new AsyncPolicyProvider.
-class AsyncPolicyProvider : public ConfigurationPolicyProvider,
-                            public base::NonThreadSafe {
- public:
-  // The AsyncPolicyProvider does a synchronous load in its constructor, and
-  // therefore it needs the |registry| at construction time. The same |registry|
-  // should be passed later to Init().
-  AsyncPolicyProvider(SchemaRegistry* registry,
-                      scoped_ptr<AsyncPolicyLoader> loader);
-  virtual ~AsyncPolicyProvider();
-
-  // ConfigurationPolicyProvider implementation.
-  virtual void Init(SchemaRegistry* registry) OVERRIDE;
-  virtual void Shutdown() OVERRIDE;
-  virtual void RefreshPolicies() OVERRIDE;
-
- private:
-  // Helper for RefreshPolicies().
-  void ReloadAfterRefreshSync();
-
-  // Invoked with the latest bundle loaded by the |loader_|.
-  void OnLoaderReloaded(scoped_ptr<PolicyBundle> bundle);
-
-  // Callback passed to the loader that it uses to pass back the current policy
-  // bundle to the provider. This is invoked on the background thread and
-  // forwards to OnLoaderReloaded() on the loop that owns the provider,
-  // if |weak_this| is still valid.
-  static void LoaderUpdateCallback(scoped_refptr<base::MessageLoopProxy> loop,
-                                   base::WeakPtr<AsyncPolicyProvider> weak_this,
-                                   scoped_ptr<PolicyBundle> bundle);
-
-  // The |loader_| that does the platform-specific policy loading. It lives
-  // on the background thread but is owned by |this|.
-  AsyncPolicyLoader* loader_;
-
-  // Used to get a WeakPtr to |this| for the update callback given to the
-  // loader.
-  base::WeakPtrFactory<AsyncPolicyProvider> weak_factory_;
-
-  // Callback used to synchronize RefreshPolicies() calls with the background
-  // thread. See the implementation for the details.
-  base::CancelableClosure refresh_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(AsyncPolicyProvider);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_ASYNC_POLICY_PROVIDER_H_