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

chrome/browser/ui/search/instant_controller.h

 // Copyright 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_UI_SEARCH_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 252 matching lines @@
   // Returns whether input is in progress, i.e. if the omnibox has focus and the
   // active tab is in mode SEARCH_SUGGESTIONS.
   bool IsInputInProgress() const;
 
   // Returns true if the local page is being used.
   bool UsingLocalPage() const;
 
   // Returns the InstantService for the browser profile.
   InstantService* GetInstantService() const;
 
+  // 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);
+
   BrowserInstantController* const browser_;
 
   // Whether the extended API and regular API are enabled. If both are false,
   // Instant is effectively disabled.
   const bool extended_enabled_;
 
   // The instances of InstantPage maintained by InstantController.
   scoped_ptr<InstantNTP> ntp_;
   scoped_ptr<InstantTab> instant_tab_;
 
@@ skipping 10 matching lines @@
   // its suggestions with the omnibox.
   gfx::Rect omnibox_bounds_;
 
   // List of events and their timestamps, useful in debugging Instant behaviour.
   mutable std::list<std::pair<int64, std::string> > debug_events_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_