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

components/prefs/testing_pref_store.h

 // 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.
 
-#ifndef COMPONENTS_PREFS_TESTING_PREF_STORE_H_
-#define COMPONENTS_PREFS_TESTING_PREF_STORE_H_
+#ifndef BASE_PREFS_TESTING_PREF_STORE_H_
+#define BASE_PREFS_TESTING_PREF_STORE_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "components/prefs/persistent_pref_store.h"
 #include "components/prefs/pref_value_map.h"
@@ skipping 87 matching lines @@
   // Whether the store contents have been committed to disk since the last
   // mutation.
   bool committed_;
 
   scoped_ptr<ReadErrorDelegate> error_delegate_;
   base::ObserverList<PrefStore::Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingPrefStore);
 };
 
-#endif  // COMPONENTS_PREFS_TESTING_PREF_STORE_H_
+#endif  // BASE_PREFS_TESTING_PREF_STORE_H_