Abstract code filtering URLs added to the history

components/history/core/browser/history_client.h

Index: components/history/core/browser/history_client.h
diff --git a/components/history/core/browser/history_client.h b/components/history/core/browser/history_client.h
index 9bfb193a8d5054605a6a63167f1c86eda51223ce..9b718142bc023d26bc89185d6eff6f5b0e94c76b 100644
--- a/components/history/core/browser/history_client.h
+++ b/components/history/core/browser/history_client.h
@@ -52,6 +52,10 @@ class HistoryClient : public KeyedService {
   // 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.