Remove MessageLoop::DestructionObserver registration from ConfigurationPolicyLoaderWin

chrome/browser/policy/configuration_policy_loader_win.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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_CONFIGURATION_POLICY_LOADER_WIN_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_LOADER_WIN_H_
 #pragma once
 
 #include "base/synchronization/waitable_event.h"
 #include "base/win/object_watcher.h"
 #include "chrome/browser/policy/asynchronous_policy_loader.h"
 
 namespace policy {
 
 // Keeps watch on Windows Group Policy notification event to trigger a policy
 // reload when Group Policy changes.
 class ConfigurationPolicyLoaderWin
     : public AsynchronousPolicyLoader,
-      public base::win::ObjectWatcher::Delegate,
-      public MessageLoop::DestructionObserver {
+      public base::win::ObjectWatcher::Delegate {
  public:
   ConfigurationPolicyLoaderWin(
       AsynchronousPolicyProvider::Delegate* delegate,
       int reload_interval_minutes);
   virtual ~ConfigurationPolicyLoaderWin() {}
 
  protected:
   // AsynchronousPolicyLoader overrides:
   virtual void InitOnFileThread();
   virtual void StopOnFileThread();
 
  private:
   // Updates the watchers and schedules the reload task if appropriate.
   void SetupWatches();
 
   // Post a reload notification and update the watch machinery.
   void Reload();
 
   // ObjectWatcher::Delegate overrides:
   virtual void OnObjectSignaled(HANDLE object);
 
-  // MessageLoop::DestructionObserver overrides:
-  virtual void WillDestroyCurrentMessageLoop();
-
   base::WaitableEvent user_policy_changed_event_;
   base::WaitableEvent machine_policy_changed_event_;
   base::win::ObjectWatcher user_policy_watcher_;
   base::win::ObjectWatcher machine_policy_watcher_;
   bool user_policy_watcher_failed_;
   bool machine_policy_watcher_failed_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyLoaderWin);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_LOADER_WIN_H_