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

chrome/browser/history/top_sites.h

 // Copyright (c) 2012 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_HISTORY_TOP_SITES_H_
 #define CHROME_BROWSER_HISTORY_TOP_SITES_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
@@ skipping 26 matching lines @@
 // descriptions below). All others are assumed to be threadsafe.
 class TopSites
     : public base::RefCountedThreadSafe<TopSites>,
       public content::NotificationObserver {
  public:
   TopSites() {}
 
   // Initializes TopSites.
   static TopSites* Create(Profile* profile, const base::FilePath& db_name);
 
-  // Helper method to shuffle MostVisited tiles for A/B testing purposes.
-  static void MaybeShuffle(MostVisitedURLList* data);
-
   // Sets the given thumbnail for the given URL. Returns true if the thumbnail
   // was updated. False means either the URL wasn't known to us, or we felt
   // that our current thumbnail was superior to the given one. Should be called
   // from the UI thread.
   virtual bool SetPageThumbnail(const GURL& url,
                                 const gfx::Image& thumbnail,
                                 const ThumbnailScore& score) = 0;
 
   // While testing the history system, we want to set the thumbnail to a piece
   // of static memory.
@@ skipping 116 matching lines @@
 
 #if defined(OS_ANDROID)
 extern const TopSites::PrepopulatedPage kPrepopulatedPages[1];
 #else
 extern const TopSites::PrepopulatedPage kPrepopulatedPages[2];
 #endif
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_TOP_SITES_H_