Remove unnecessary includes.

chrome/browser/content_settings/content_settings_pref_provider.cc

 // 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.
 
 #include "chrome/browser/content_settings/content_settings_pref_provider.h"
 
 #include <map>
 #include <string>
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/time/clock.h"
 #include "base/time/default_clock.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_rule.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 #include "content/public/browser/user_metrics.h"
 #include "url/gurl.h"
 
 using base::UserMetricsAction;
 using content::BrowserThread;
 
 namespace {
 
 typedef std::pair<std::string, std::string> StringPair;
 typedef std::map<std::string, std::string> StringMap;
@@ skipping 614 matching lines @@
   lock_.Acquire();
   lock_.Release();
 #endif
 }
 
 void PrefProvider::SetClockForTesting(scoped_ptr<base::Clock> clock) {
   clock_ = clock.Pass();
 }
 
 }  // namespace content_settings