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

extensions/browser/extension_pref_store.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 EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_
 #define EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_
 
 #include <string>
 
 #include "base/macros.h"
-#include "components/prefs/value_map_pref_store.h"
+#include "base/prefs/value_map_pref_store.h"
 #include "extensions/browser/extension_pref_value_map.h"
 
 // A (non-persistent) PrefStore implementation that holds effective preferences
 // set by extensions. These preferences are managed by and fetched from an
 // ExtensionPrefValueMap.
 class ExtensionPrefStore : public ValueMapPrefStore,
                            public ExtensionPrefValueMap::Observer {
  public:
   // Constructs an ExtensionPrefStore for a regular or an incognito profile.
   ExtensionPrefStore(ExtensionPrefValueMap* extension_pref_value_map,
                      bool incognito_pref_store);
 
   // Overrides for ExtensionPrefValueMap::Observer:
   void OnInitializationCompleted() override;
   void OnPrefValueChanged(const std::string& key) override;
   void OnExtensionPrefValueMapDestruction() override;
 
  protected:
   ~ExtensionPrefStore() override;
 
  private:
   ExtensionPrefValueMap* extension_pref_value_map_;  // Weak pointer.
   bool incognito_pref_store_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefStore);
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_