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 9863d572b7cc21fdc08c3b408f83dfecd6d07570..20a0128afe72c67205aff17b5803785ea8e51dbc 100644
--- a/chrome/browser/search/search.cc
+++ b/chrome/browser/search/search.cc
@@ -66,6 +66,7 @@ const char kLocalOnlyFlagName[] = "local_only";
 const char kPreloadLocalOnlyNTPFlagName[] = "preload_local_only_ntp";
 const char kUseRemoteNTPOnStartupFlagName[] = "use_remote_ntp_on_startup";
 const char kShowNtpFlagName[] = "show_ntp";
+const char kRecentTabsOnNTPFlagName[] = "show_recent_tabs";
 
 // Constants for the field trial name and group prefix.
 const char kInstantExtendedFieldTrialName[] = "InstantExtended";
@@ -565,6 +566,18 @@ bool ShouldShowInstantNTP() {
   return true;
 }
 
+bool ShouldShowRecentTabsOnNTP() {
+  FieldTrialFlags flags;
+  if (GetFieldTrialInfo(
+          base::FieldTrialList::FindFullName(kInstantExtendedFieldTrialName),
+          &flags, NULL)) {
+    return GetBoolValueForFlagWithDefault(
+        kRecentTabsOnNTPFlagName, 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();
 }