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

chrome/browser/ui/browser_instant_controller.cc

 // 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.
 
 #include "chrome/browser/ui/browser_instant_controller.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_web_ui.h"
@@ skipping 127 matching lines @@
   if (search_terms.empty())
     return false;
 
   return instant_.SubmitQuery(search_terms);
 }
 
 Profile* BrowserInstantController::profile() const {
   return browser_->profile();
 }
 
+const TabStripModel* BrowserInstantController::tab_strip_model() const {
+  return browser_->tab_strip_model();
+}
+
 void BrowserInstantController::ReplaceWebContentsAt(
     int index,
     scoped_ptr<content::WebContents> new_contents) {
   DCHECK_NE(TabStripModel::kNoTab, index);
   scoped_ptr<content::WebContents> old_contents(browser_->tab_strip_model()->
       ReplaceWebContentsAt(index, new_contents.release()));
   instant_unload_handler_.RunUnloadListenersOrDestroy(old_contents.Pass(),
                                                       index);
 }
 
@@ skipping 127 matching lines @@
     if (!instant_service->IsInstantProcess(
             contents->GetRenderProcessHost()->GetID()))
       continue;
 
     // Reload the contents to ensure that it gets assigned to a non-priviledged
     // renderer.
     contents->GetController().Reload(false);
   }
   instant_.OnDefaultSearchProviderChanged();
 }