Do not select old bookmarks in ntp_snippets::BookmarkSuggestionsProvider

components/ntp_snippets/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
@@ skipping 84 matching lines @@
       "category.h",
       "category_info.h",
       "category_status.h",
     ]
   }
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
+    "bookmarks/bookmark_last_visit_utils_unittest.cc",
     "category_factory_unittest.cc",
     "content_suggestions_service_unittest.cc",
     "mock_content_suggestions_provider_observer.cc",
     "mock_content_suggestions_provider_observer.h",
     "ntp_snippet_unittest.cc",
     "ntp_snippets_database_unittest.cc",
     "ntp_snippets_fetcher_unittest.cc",
     "ntp_snippets_service_unittest.cc",
     "ntp_snippets_status_service_unittest.cc",
     "ntp_snippets_test_utils.cc",
     "ntp_snippets_test_utils.h",
     "physical_web_pages/physical_web_page_suggestions_provider_unittest.cc",
     "request_throttler_unittest.cc",
   ]
 
   deps = [
     ":ntp_snippets",
     "//base",
     "//base/test:test_support",
     "//components/image_fetcher",

[Marc Treib, 2016/09/01 11:16:32]

I think you need to add //components/bookmarks/browser and
//components/bookmarks/test here?

[vitaliii, 2016/09/01 11:38:42]

Done.

     "//components/leveldb_proto:test_support",
     "//components/signin/core/browser:test_support",
     "//components/signin/core/common",
     "//components/strings",
     "//components/sync:test_support_sync_driver",
     "//components/variations",
     "//net:test_support",
     "//testing/gtest",
     "//third_party/icu/",
     "//ui/gfx:test_support",
   ]
 }