[Suggestions] Moving suggestions code to a new component

chrome/browser/search/suggestions/suggestions_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 CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_STORE_H_
-#define CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_STORE_H_
-
-#include "base/macros.h"
-#include "chrome/browser/search/suggestions/proto/suggestions.pb.h"
-
-class PrefService;
-
-namespace user_prefs {
-class PrefRegistrySyncable;
-}  // namespace user_prefs
-
-namespace suggestions {
-
-// A helper class for reading and writing the suggestions to the profile's
-// preference file.
-class SuggestionsStore {
- public:
-  explicit SuggestionsStore(PrefService* profile_prefs);
-  virtual ~SuggestionsStore();
-
-  // Loads the suggestion data from the profile's preferences into
-  // |suggestions|. If there is a problem with loading, the pref value is
-  // cleared, false is returned and |suggestions| is cleared. If successful,
-  // |suggestions| will contain the loaded data and true is returned.
-  virtual bool LoadSuggestions(SuggestionsProfile* suggestions);
-
-  // Stores the provided |suggestions| to the profile's preferences, using
-  // a base64 encoding of its protobuf serialization.
-  virtual bool StoreSuggestions(const SuggestionsProfile& suggestions);
-
-  // Clears any suggestion data from the profile's preferences.
-  virtual void ClearSuggestions();
-
-  // Register SuggestionsStore related prefs in the Profile prefs.
-  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
-
- protected:
-  // Test seam. For simplicity of mock creation.
-  SuggestionsStore() {}
-
- private:
-  // The pref service used to persist the suggestions data.
-  PrefService* pref_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(SuggestionsStore);
-};
-
-}  // namespace suggestions
-
-#endif  // CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_STORE_H_