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

chrome/browser/search/search.cc

Index: chrome/browser/search/search.cc
diff --git a/chrome/browser/search/search.cc b/chrome/browser/search/search.cc
index ba0820034c10d4e72a5531096e2dc58eae104b0b..68693e244effbdbe500e55403889a2d4685ac2d7 100644
--- a/chrome/browser/search/search.cc
+++ b/chrome/browser/search/search.cc
@@ -62,6 +62,9 @@ const char kLocalOnlyFlagName[] = "local_only";
 // Key for specifying local NTP behavior trials.
 const char kLocalNTPFlagName[] = "local_ntp";
 
+// Key for showing the recently closed link on the local NTP.
+const char kRecentlyClosedOnNTPFlagName[] = "show_recently_closed";
+
 // Constants for the field trial name and group prefix.
 const char kInstantExtendedFieldTrialName[] = "InstantExtended";
 const char kGroupNumberPrefix[] = "Group";
@@ -493,6 +496,18 @@ bool IsAggressiveLocalNTPFallbackEnabled() {
   return false;
 }
 
+bool ShouldShowRecentlyClosedOnNTP() {
+  FieldTrialFlags flags;
+  if (GetFieldTrialInfo(
+          base::FieldTrialList::FindFullName(kInstantExtendedFieldTrialName),
+          &flags, NULL)) {
+    return GetBoolValueForFlagWithDefault(
+        kRecentlyClosedOnNTPFlagName, false, flags);
+  }
+
+  return false;
+}
+
 bool MatchesOriginAndPath(const GURL& my_url, const GURL& other_url) {
   return MatchesOrigin(my_url, other_url) && my_url.path() == other_url.path();
 }