Add finch flag for rendering a recently closed link on the local ntp.

chrome/browser/search/search.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_SEARCH_SEARCH_H_
 #define CHROME_BROWSER_SEARCH_SEARCH_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 123 matching lines @@
 // so this simply returns whether GetInstantURL() is a valid URL.
 // NOTE: This method expands the default search engine's instant_url template,
 // so it shouldn't be called from SearchTermsData or other such code that would
 // lead to an infinite recursion.
 bool IsInstantEnabled(Profile* profile);
 
 // Returns true if 'use_remote_ntp_on_startup' flag is enabled in field trials
 // to always show the remote NTP on browser startup.
 bool ShouldPreferRemoteNTPOnStartup();
 
+// Returns true if the recent tabs link should be shown on the local NTP in
+// field trials.
+bool ShouldShowRecentTabsOnNTP();
+
 // Returns true if |my_url| matches |other_url|.
 bool MatchesOriginAndPath(const GURL& my_url, const GURL& other_url);
 
 // Transforms the input |url| into its "privileged URL". The returned URL
 // facilitates grouping process-per-site. The |url| is transformed, for
 // example, from
 //
 //   https://www.google.com/search?espv=1&q=tractors
 //
 // to the privileged URL
@@ skipping 63 matching lines @@
 // template. Exposed for testing only.
 bool DefaultSearchProviderSupportsInstant(Profile* profile);
 
 // Let tests reset the gate that prevents metrics from being sent more than
 // once.
 void ResetInstantExtendedOptInStateGateForTest();
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SEARCH_SEARCH_H_