Only show Last N Pages in the UI when the corresponding tab is visible.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1427 matching lines @@
     "//components/net_log",
     "//components/network_hints/common",
     "//components/network_session_configurator",
     "//components/network_time",
     "//components/ntp_snippets",
     "//components/ntp_tiles",
     "//components/offline_pages/content/background_loader",
     "//components/offline_pages/core",
     "//components/offline_pages/core/background:background_offliner",
     "//components/offline_pages/core/downloads:offline_pages_ui_adapter",
+    "//components/offline_pages/core/recent_tabs",
     "//components/offline_pages/core/request_header:request_header",
     "//components/omnibox/browser",
     "//components/os_crypt",
     "//components/packed_ct_ev_whitelist",
     "//components/password_manager/content/browser",
     "//components/password_manager/core/browser",
     "//components/password_manager/core/common",
     "//components/password_manager/sync/browser",
     "//components/payments:payment_app",
     "//components/payments:payment_request",
@@ skipping 3064 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }