Add a tab helper to record the last visit date for each bookmark.

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")
 }
 
 # GYP version: components/ntp_snippets.gypi:ntp_snippets
 static_library("ntp_snippets") {
   sources = [
+    "bookmarks/bookmark_last_visit_date_helper.cc",
+    "bookmarks/bookmark_last_visit_date_helper.h",
     "content_suggestion.cc",
     "content_suggestion.h",
     "content_suggestions_category.h",
     "content_suggestions_category_status.cc",
     "content_suggestions_category_status.h",
     "content_suggestions_provider.cc",
     "content_suggestions_provider.h",
     "content_suggestions_service.cc",
     "content_suggestions_service.h",
     "ntp_snippet.cc",
@@ skipping 26 matching lines @@
     "//components/prefs",
     "//components/signin/core/browser",
     "//components/suggestions",
     "//components/sync_driver",
     "//google_apis",
     "//net",
     "//url",
   ]
 
   deps = [
+    "//components/bookmarks/browser",
     "//components/data_use_measurement/core",
     "//components/image_fetcher",
     "//components/metrics",
     "//components/ntp_snippets/proto",
     "//components/offline_pages",
     "//components/variations",
     "//components/variations/net",
     "//third_party/icu/",
     "//ui/gfx",
   ]
@@ skipping 29 matching lines @@
     "//components/leveldb_proto:test_support",
     "//components/signin/core/browser:test_support",
     "//components/signin/core/common",
     "//components/sync_driver:test_support",
     "//components/variations",
     "//net:test_support",
     "//testing/gtest",
     "//third_party/icu/",
   ]
 }