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

components/prefs/pref_registry_simple.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_PREF_REGISTRY_SIMPLE_H_
-#define COMPONENTS_PREFS_PREF_REGISTRY_SIMPLE_H_
+#ifndef BASE_PREFS_PREF_REGISTRY_SIMPLE_H_
+#define BASE_PREFS_PREF_REGISTRY_SIMPLE_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/macros.h"
 #include "components/prefs/base_prefs_export.h"
 #include "components/prefs/pref_registry.h"
 
 namespace base {
 class DictionaryValue;
 class FilePath;
 class ListValue;
 }
 
 // A simple implementation of PrefRegistry.
-class COMPONENTS_PREFS_EXPORT PrefRegistrySimple : public PrefRegistry {
+class BASE_PREFS_EXPORT PrefRegistrySimple : public PrefRegistry {
  public:
   PrefRegistrySimple();
 
   void RegisterBooleanPref(const std::string& path, bool default_value);
   void RegisterIntegerPref(const std::string& path, int default_value);
   void RegisterDoublePref(const std::string& path, double default_value);
   void RegisterStringPref(const std::string& path,
                           const std::string& default_value);
   void RegisterFilePathPref(const std::string& path,
                             const base::FilePath& default_value);
@@ skipping 47 matching lines @@
                                 uint32_t flags);
 
  private:
   void RegisterPrefAndNotify(const std::string&,
                              base::Value* default_value,
                              uint32_t flags);
 
   DISALLOW_COPY_AND_ASSIGN(PrefRegistrySimple);
 };
 
-#endif  // COMPONENTS_PREFS_PREF_REGISTRY_SIMPLE_H_
+#endif  // BASE_PREFS_PREF_REGISTRY_SIMPLE_H_