Abstract code filtering URLs added to the history

components/history/core/browser/history_client.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 COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_CLIENT_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_CLIENT_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 34 matching lines @@
   virtual bool IsBookmarked(const GURL& url);
 
   // Returns, by reference in |bookmarks|, the set of bookmarked urls and their
   // titles. This returns the unique set of URLs. For example, if two bookmarks
   // reference the same URL only one entry is added even if the title are not
   // the same.
   //
   // If not on the main thread, then BlockUntilBookmarksLoaded must be called.
   virtual void GetBookmarks(std::vector<URLAndTitle>* bookmarks);
 
+  // Returns true if this look like the type of URL that should be added to the
+  // history.
+  virtual bool CanAddURL(const GURL& url);
+
   // Notifies the embedder that there was a problem reading the database.
   //
   // Must be called from the main thread.
   virtual void NotifyProfileError(sql::InitStatus init_status);
 
   // Returns whether database errors should be reported to the crash server.
   virtual bool ShouldReportDatabaseError();
 
   // Called upon initialization of the HistoryBackend.
   virtual void OnHistoryBackendInitialized(
       HistoryBackend* history_backend,
       HistoryDatabase* history_database,
       ThumbnailDatabase* thumbnail_database,
       const base::FilePath& history_dir);
 
   // Called upon destruction of the HistoryBackend.
   virtual void OnHistoryBackendDestroyed(HistoryBackend* history_backend,
                                          const base::FilePath& history_dir);
 
  protected:
   DISALLOW_COPY_AND_ASSIGN(HistoryClient);
 };
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_CLIENT_H_