Delete old policy code after AsyncPolicyLoader refactor.

chrome/browser/policy/file_based_policy_loader.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_FILE_BASED_POLICY_LOADER_H_
-#define CHROME_BROWSER_POLICY_FILE_BASED_POLICY_LOADER_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "base/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time.h"
-#include "chrome/browser/policy/asynchronous_policy_loader.h"
-#include "chrome/browser/policy/file_based_policy_provider.h"
-
-namespace base {
-namespace files {
-
-class FilePathWatcher;
-
-}  // namespace files
-}  // namespace base
-
-namespace policy {
-
-// A customized asynchronous policy loader that handles loading policy from a
-// file using a FilePathWatcher. The loader creates a fallback task to load
-// policy periodically in case the watcher fails and retries policy loads when
-// the watched file is in flux.
-class FileBasedPolicyLoader : public AsynchronousPolicyLoader {
- public:
-  explicit FileBasedPolicyLoader(
-      FileBasedPolicyProvider::ProviderDelegate* provider_delegate);
-
-  // AsynchronousPolicyLoader overrides:
-  virtual void Reload(bool force) OVERRIDE;
-
-  void OnFilePathChanged(const FilePath& path);
-  void OnFilePathError(const FilePath& path);
-
- protected:
-  // FileBasedPolicyLoader objects should only be deleted by
-  // RefCountedThreadSafe.
-  friend class base::RefCountedThreadSafe<AsynchronousPolicyLoader>;
-  virtual ~FileBasedPolicyLoader();
-
-  const FilePath& config_file_path() { return config_file_path_; }
-
-  // AsynchronousPolicyLoader overrides:
-
-  // Creates the file path watcher and configures it to watch
-  // |config_file_path_|.  Must be called on the file thread.
-  virtual void InitOnFileThread() OVERRIDE;
-  virtual void StopOnFileThread() OVERRIDE;
-
- private:
-  // Checks whether policy information is safe to read. If not, returns false
-  // and then delays until it is considered safe to reload in |delay|.
-  // Must be called on the file thread.
-  bool IsSafeToReloadPolicy(const base::Time& now, base::TimeDelta* delay);
-
-  // The path at which we look for configuration files.
-  const FilePath config_file_path_;
-
-  // Managed with a scoped_ptr rather than being declared as an inline member to
-  // decouple the watcher's life cycle from the loader's. This decoupling makes
-  // it possible to destroy the watcher before the loader's destructor is called
-  // (e.g. during Stop), since |watcher_| internally holds a reference to the
-  // loader and keeps it alive.
-  scoped_ptr<base::files::FilePathWatcher> watcher_;
-
-  // Settle interval.
-  const base::TimeDelta settle_interval_;
-
-  // Records last known modification timestamp of |config_file_path_|.
-  base::Time last_modification_file_;
-
-  // The wall clock time at which the last modification timestamp was
-  // recorded.  It's better to not assume the file notification time and the
-  // wall clock times come from the same source, just in case there is some
-  // non-local filesystem involved.
-  base::Time last_modification_clock_;
-
-  DISALLOW_COPY_AND_ASSIGN(FileBasedPolicyLoader);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_FILE_BASED_POLICY_LOADER_H_