Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/extensions/external_policy_loader.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/extensions/external_policy_loader.h"
 
+#include "base/bind.h"
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/external_provider_impl.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 
 namespace extensions {
 
 ExternalPolicyLoader::ExternalPolicyLoader(Profile* profile)
     : profile_(profile) {
   pref_change_registrar_.Init(profile_->GetPrefs());
   pref_change_registrar_.Add(prefs::kExtensionInstallForceList,
                              base::Bind(&ExternalPolicyLoader::StartLoading,
@@ skipping 30 matching lines @@
 }
 
 void ExternalPolicyLoader::StartLoading() {
   const DictionaryValue* forcelist =
       profile_->GetPrefs()->GetDictionary(prefs::kExtensionInstallForceList);
   prefs_.reset(forcelist ? forcelist->DeepCopy() : NULL);
   LoadFinished();
 }
 
 }  // namespace extensions