[TooManyTabs] Add TabNavigationThrottle

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 3561 matching lines @@
       "repost_form_warning_controller.cc",
       "repost_form_warning_controller.h",
       "resource_coordinator/tab_manager.cc",
       "resource_coordinator/tab_manager.h",
       "resource_coordinator/tab_manager_delegate_chromeos.cc",
       "resource_coordinator/tab_manager_delegate_chromeos.h",
       "resource_coordinator/tab_manager_observer.cc",
       "resource_coordinator/tab_manager_observer.h",
       "resource_coordinator/tab_manager_web_contents_data.cc",
       "resource_coordinator/tab_manager_web_contents_data.h",
+      "resource_coordinator/tab_navigation_throttle.cc",
+      "resource_coordinator/tab_navigation_throttle.h",
       "resource_coordinator/tab_stats.cc",
       "resource_coordinator/tab_stats.h",
       "search/local_ntp_source.cc",
       "search/local_ntp_source.h",
       "search/one_google_bar/one_google_bar_data.cc",
       "search/one_google_bar/one_google_bar_data.h",
       "search/one_google_bar/one_google_bar_fetcher.h",
       "search/one_google_bar/one_google_bar_fetcher_impl.cc",
       "search/one_google_bar/one_google_bar_fetcher_impl.h",
       "search/one_google_bar/one_google_bar_service.cc",
@@ skipping 1182 matching lines @@
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }