predictors: Make the resource_prefetch_predictor accessible from Java.

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 222 matching lines @@
   void OnMainFrameRequest(const URLRequestSummary& request);
   void OnMainFrameResponse(const URLRequestSummary& response);
   void OnMainFrameRedirect(const URLRequestSummary& response);
   void OnSubresourceResponse(const URLRequestSummary& response);
 
   // Called when onload completes for a navigation. We treat this point as the
   // "completion" of the navigation. The resources requested by the page up to
   // this point are the only ones considered for prefetching.
   void OnNavigationComplete(const NavigationID& nav_id_without_timing_info);
 
-  // Returns true if there is PrefetchData that can be used for the
-  // navigation and fills in the |prefetch_data| to resources that need to be
-  // prefetched.
-  bool GetPrefetchData(const NavigationID& navigation_id,
-                       std::vector<GURL>* urls,
-                       PrefetchKeyType* key_type);
+  // Returns true if there is PrefetchData that can be used for a URL and fills
+  // |urls| with resources that need to be prefetched.
+  bool GetPrefetchData(const GURL& main_frame_url, std::vector<GURL>* urls);
 
   // Converts a PrefetchData into a list of URLs.
   void PopulatePrefetcherRequest(const PrefetchData& data,
                                  std::vector<GURL>* urls);
 
+ public:
   // Starts prefetching if it is enabled and prefetching data exists for the
   // NavigationID either at the URL or at the host level.
-  void StartPrefetching(const NavigationID& navigation_id);
+  void StartPrefetching(const GURL& main_frame_url);
 
   // Stops prefetching that may be in progress corresponding to |navigation_id|.
-  void StopPrefetching(const NavigationID& navigation_id);
+  void StopPrefetching(const GURL& main_frame_url);
 
+ private:
   // Starts initialization by posting a task to the DB thread to read the
   // predictor database.
   void StartInitialization();
 
   // Callback for task to read predictor database. Takes ownership of
   // all arguments.
   void CreateCaches(std::unique_ptr<PrefetchDataMap> url_data_map,
                     std::unique_ptr<PrefetchDataMap> host_data_map,
                     std::unique_ptr<RedirectDataMap> url_redirect_data_map,
                     std::unique_ptr<RedirectDataMap> host_redirect_data_map);
@@ skipping 90 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_