Componentize SearchProvider

chrome/browser/autocomplete/answers_cache.cc

-// 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.
-
-#include "chrome/browser/autocomplete/answers_cache.h"
-
-#include "base/strings/string_util.h"
-
-AnswersQueryData::AnswersQueryData() {
-}
-AnswersQueryData::AnswersQueryData(const base::string16& text,
-                                   const base::string16& type)
-    : full_query_text(text), query_type(type) {
-}
-
-AnswersCache::AnswersCache(size_t max_entries) : max_entries_(max_entries) {
-}
-
-AnswersCache::~AnswersCache() {
-}
-
-AnswersQueryData AnswersCache::GetTopAnswerEntry(const base::string16& query) {
-  base::string16 collapsed_query = base::CollapseWhitespace(query, false);
-  for (Cache::iterator it = cache_.begin(); it != cache_.end(); ++it) {
-    // If the query text starts with trimmed input, this is valid prefetch data.
-    if (StartsWith(it->full_query_text, collapsed_query, false)) {
-      // Move the touched item to the front of the list.
-      cache_.splice(cache_.begin(), cache_, it);
-      return cache_.front();
-    }
-  }
-  return AnswersQueryData();
-}
-
-void AnswersCache::UpdateRecentAnswers(const base::string16& full_query_text,
-                                       const base::string16& query_type) {
-  // If this entry is already part of the cache, just update recency.
-  for (Cache::iterator it = cache_.begin(); it != cache_.end(); ++it) {
-    if (full_query_text == it->full_query_text &&
-        query_type == it->query_type) {
-      cache_.splice(cache_.begin(), cache_, it);
-      return;
-    }
-  }
-
-  // Evict if cache size is exceeded.
-  if (cache_.size() >= max_entries_)
-    cache_.pop_back();
-
-  cache_.push_front(AnswersQueryData(full_query_text, query_type));
-}