predictors: Refactor the resource_prefetch_predictor database handling.

chrome/browser/predictors/resource_prefetch_predictor.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_H_
 #define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 162 matching lines @@
            ResourcePrefetcher::RequestVector* requests);
     ~Result();
 
     PrefetchKeyType key_type;
     std::unique_ptr<ResourcePrefetcher::RequestVector> requests;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Result);
   };
 
-  typedef ResourcePrefetchPredictorTables::ResourceRow ResourceRow;
-  typedef ResourcePrefetchPredictorTables::ResourceRows ResourceRows;
   typedef ResourcePrefetchPredictorTables::PrefetchData PrefetchData;
   typedef ResourcePrefetchPredictorTables::PrefetchDataMap PrefetchDataMap;
   typedef std::map<NavigationID, linked_ptr<std::vector<URLRequestSummary> > >
       NavigationMap;
   typedef std::map<NavigationID, std::unique_ptr<Result>> ResultsMap;
 
   // Returns true if the main page request is supported for prediction.
   static bool IsHandledMainPage(net::URLRequest* request);
 
   // Returns true if the subresource request is supported for prediction.
@@ skipping 150 matching lines @@
 
   ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
       history_service_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetchPredictor);
 };
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_H_