Cleanup: Remove unneeded chrome/common/pref_names.h includes.

chrome/browser/notifications/message_center_notification_manager_win.cc

 // Copyright 2013 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/notifications/message_center_notification_manager.h"
 
-#include "chrome/common/pref_names.h"
 #include "ui/message_center/message_center_tray.h"
 
 void MessageCenterNotificationManager::DisplayFirstRunBalloon() {
   // Store for posterity the fact that we've shown the first-run balloon.
   DCHECK(tray_.get());
   first_run_pref_.SetValue(true);
   tray_->DisplayFirstRunBalloon();
 }
 
 void MessageCenterNotificationManager::SetFirstRunTimeoutForTest(
@@ skipping 26 matching lines @@
   // No need to restart the timer if it's already going.
   if (first_run_balloon_timer_.IsRunning())
     return;
 
   first_run_balloon_timer_.Start(
       FROM_HERE,
       first_run_idle_timeout_,
       base::Bind(&MessageCenterNotificationManager::DisplayFirstRunBalloon,
                  weak_factory_.GetWeakPtr()));
 }