Revert of Delete base/prefs and update callers to use components.

components/bookmarks/managed/managed_bookmarks_tracker.h

 // Copyright 2014 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 COMPONENTS_BOOKMARKS_MANAGED_MANAGED_BOOKMARKS_TRACKER_H_
 #define COMPONENTS_BOOKMARKS_MANAGED_MANAGED_BOOKMARKS_TRACKER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
+#include "base/prefs/pref_change_registrar.h"
 #include "base/strings/string16.h"
-#include "components/prefs/pref_change_registrar.h"
 
 class GURL;
 class PrefService;
 
 namespace base {
 class ListValue;
 }
 
 namespace bookmarks {
 
@@ skipping 62 matching lines @@
   PrefChangeRegistrar registrar_;
   GetManagementDomainCallback get_management_domain_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagedBookmarksTracker);
 };
 
 }  // namespace bookmarks
 
 #endif  // COMPONENTS_BOOKMARKS_MANAGED_MANAGED_BOOKMARKS_TRACKER_H_