Field trial removing tiles from NTP if URL is already open - for 1993 clients

chrome/browser/ui/search/instant_page.h

 // Copyright 2013 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_UI_SEARCH_INSTANT_PAGE_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 177 matching lines @@
                            content::PageTransition transition,
                            WindowOpenDisposition disposition,
                            bool is_search_type);
   void OnCountMouseover(int page_id);
   void OnDeleteMostVisitedItem(int page_id, const GURL& url);
   void OnUndoMostVisitedDeletion(int page_id, const GURL& url);
   void OnUndoAllMostVisitedDeletions(int page_id);
 
   void ClearContents();
 
+  // Removes recommended URLs if a matching URL is already open in the Browser,
+  // if the Most Visited Tile Placement experiment is enabled, and the client is
+  // in the experiment group.
+  void MaybeRemoveMostVisitedItems(std::vector<InstantMostVisitedItem>* items);
+
   // Returns the InstantService for the |profile_|.
   InstantService* GetInstantService();
 
   Profile* profile_;
   Delegate* const delegate_;
   scoped_ptr<InstantIPCSender> ipc_sender_;
   const std::string instant_url_;
   const bool is_incognito_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantPage);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_