Cosmetic cleanups in chrome/browser/policy/

chrome/browser/policy/delayed_work_scheduler.cc

 // 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.
 
 #include "chrome/browser/policy/delayed_work_scheduler.h"
 
-#include <algorithm>
-
-#include "base/logging.h"
-#include "base/message_loop.h"
-
 namespace policy {
 
 DelayedWorkScheduler::DelayedWorkScheduler() {
 }
 
 DelayedWorkScheduler::~DelayedWorkScheduler() {
   timer_.Stop();
 }
 
 void DelayedWorkScheduler::DoDelayedWork() {
   callback_.Run();
 }
 
 void DelayedWorkScheduler::CancelDelayedWork() {
   timer_.Stop();
 }
 
 void DelayedWorkScheduler::PostDelayedWork(
     const base::Closure& callback,
     int64 delay) {
   callback_ = callback;
   timer_.Start(FROM_HERE,
                base::TimeDelta::FromMilliseconds(delay),
                this,
                &DelayedWorkScheduler::DoDelayedWork);
 }
 
 }  // namespace policy