Componentize SearchProvider

chrome/browser/autocomplete/answers_cache.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_AUTOCOMPLETE_ANSWERS_CACHE_H_
-#define CHROME_BROWSER_AUTOCOMPLETE_ANSWERS_CACHE_H_
-
-#include <list>
-
-#include "base/basictypes.h"
-#include "base/strings/string16.h"
-
-struct AnswersQueryData {
-  AnswersQueryData();
-  AnswersQueryData(const base::string16& full_query_text,
-                   const base::string16& query_type);
-  base::string16 full_query_text;
-  base::string16 query_type;
-};
-
-// Cache for the most-recently seen answer for Answers in Suggest.
-class AnswersCache {
- public:
-  explicit AnswersCache(size_t max_entries);
-  ~AnswersCache();
-
-  // Gets the top answer query completion for the query term. The query data
-  // will contain empty query text and type if no matching data was found.
-  AnswersQueryData GetTopAnswerEntry(const base::string16& query);
-
-  // Registers a query that received an answer suggestion.
-  void UpdateRecentAnswers(const base::string16& full_query_text,
-                           const base::string16& query_type);
-
-  // Signals if cache is empty.
-  bool empty() const { return cache_.empty(); }
-
- private:
-  size_t max_entries_;
-  typedef std::list<AnswersQueryData> Cache;
-  Cache cache_;
-
-  DISALLOW_COPY_AND_ASSIGN(AnswersCache);
-};
-
-#endif  // CHROME_BROWSER_AUTOCOMPLETE_ANSWERS_CACHE_H_