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 9351f1e4ce05f8b7a15da53ee20b2ec699a3263f..9e35e0573c17ad87f55e616f4a61daebd1c2d0be 100644
--- a/chrome/browser/search/search.cc
+++ b/chrome/browser/search/search.cc
@@ -68,6 +68,9 @@ const char kLocalOnlyFlagName[] = "local_only";
 // Key for specifying remote NTP behavior trials.
 const char kUseRemoteNTPOnStartupFlagName[] = "use_remote_ntp_on_startup";
 
+// Key for showing the recent tabs link on the local NTP.
+const char kRecentTabsOnNTPFlagName[] = "show_recent_tabs";
+
 // Constants for the field trial name and group prefix.
 const char kInstantExtendedFieldTrialName[] = "InstantExtended";
 const char kGroupNumberPrefix[] = "Group";
@@ -516,6 +519,18 @@ bool ShouldPreferRemoteNTPOnStartup() {
   return false;
 }
 
+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();
 }