predictors: Use redirect data in prefetch.

chrome/browser/predictors/resource_prefetch_predictor_tables.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_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TABLES_H_
 #define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TABLES_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 77 matching lines @@
   // misses from |data|.
   static void TrimResources(PrefetchData* data, size_t max_consecutive_misses);
 
   // Sorts the resources by score, decreasing.
   static void SortResources(PrefetchData* data);
 
   // Removes the redirects with more than |max_consecutive_misses| consecutive
   // misses from |data|.
   static void TrimRedirects(RedirectData* data, size_t max_consecutive_misses);
 
-  // Sorts the redirects by score, decreasing.
-  static void SortRedirects(RedirectData* data);
-
   // The maximum length of the string that can be stored in the DB.
   static constexpr size_t kMaxStringLength = 1024;
 
  private:
   // Represents the type of information that is stored in prefetch database.
   enum class PrefetchDataType { RESOURCE, REDIRECT };
 
   enum class TableOperationType { INSERT, REMOVE };
 
   friend class PredictorDatabaseInternal;
@@ skipping 17 matching lines @@
   bool UpdateDataHelper(PrefetchKeyType key_type,
                         PrefetchDataType data_type,
                         const std::string& key,
                         const google::protobuf::MessageLite& data);
   void DeleteDataHelper(PrefetchKeyType key_type,
                         PrefetchDataType data_type,
                         const std::vector<std::string>& keys);
 
   // Computes score of |data|.
   static float ComputeResourceScore(const ResourceData& data);
-  static float ComputeRedirectScore(const RedirectStat& data);
 
   // PredictorTableBase methods.
   void CreateTableIfNonExistent() override;
   void LogDatabaseStats() override;
 
   // Database version. Always increment it when any change is made to the data
   // schema (including the .proto).
   static constexpr int kDatabaseVersion = 4;
 
   static bool DropTablesIfOutdated(sql::Connection* db);
   static int GetDatabaseVersion(sql::Connection* db);
   static bool SetDatabaseVersion(sql::Connection* db, int version);
 
   // Helper to return Statements for cached Statements.
   std::unique_ptr<sql::Statement> GetTableUpdateStatement(
       PrefetchKeyType key_type,
       PrefetchDataType data_type,
       TableOperationType op_type);
 
   static const char* GetTableName(PrefetchKeyType key_type,
                                   PrefetchDataType data_type);
 
   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetchPredictorTables);
 };
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TABLES_H_