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

chrome/browser/search/local_ntp_source.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/search/local_ntp_source.h"
 
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
+#include "chrome/browser/search/search.h"
 #include "chrome/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "grit/ui_resources.h"
 #include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/webui/jstemplate_builder.h"
 
@@ skipping 42 matching lines @@
 // Adds a localized string keyed by resource id to the dictionary.
 void AddString(base::DictionaryValue* dictionary,
                const std::string& key,
                int resource_id) {
   dictionary->SetString(key, l10n_util::GetStringUTF16(resource_id));
 }
 
 // Returns a JS dictionary of translated strings for the local NTP.
 std::string GetTranslatedStrings() {
   base::DictionaryValue translated_strings;
+  if (chrome::ShouldShowRecentTabsOnNTP())
+    AddString(&translated_strings, "recentTabs", IDS_RECENT_TABS_MENU);
   AddString(&translated_strings, "thumbnailRemovedNotification",
             IDS_NEW_TAB_THUMBNAIL_REMOVED_NOTIFICATION);
   AddString(&translated_strings, "removeThumbnailTooltip",
             IDS_NEW_TAB_REMOVE_THUMBNAIL_TOOLTIP);
   AddString(&translated_strings, "undoThumbnailRemove",
             IDS_NEW_TAB_UNDO_THUMBNAIL_REMOVE);
   AddString(&translated_strings, "restoreThumbnailsShort",
             IDS_NEW_TAB_RESTORE_THUMBNAILS_SHORT_LINK);
   AddString(&translated_strings, "attributionIntro",
             IDS_NEW_TAB_ATTRIBUTION_INTRO);
@@ skipping 62 matching lines @@
   }
   return false;
 }
 
 std::string LocalNtpSource::GetContentSecurityPolicyFrameSrc() const {
   // Allow embedding of suggestion and most visited iframes.
   return base::StringPrintf("frame-src %s %s;",
                             chrome::kChromeSearchSuggestionUrl,
                             chrome::kChromeSearchMostVisitedUrl);
 }