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

chrome/browser/search/search.h

Index: chrome/browser/search/search.h
diff --git a/chrome/browser/search/search.h b/chrome/browser/search/search.h
index e56a902c2fee18bb6bd2893d456ff6049dc03102..91ceb5cb9de4e78e94996460cb761b52f4639d01 100644
--- a/chrome/browser/search/search.h
+++ b/chrome/browser/search/search.h
@@ -154,6 +154,10 @@ bool ShouldPreloadLocalOnlyNTP();
 // Returns true if the Instant NTP should be shown and false if not.
 bool ShouldShowInstantNTP();
 
+// 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);