[Re-land] Add network throttling as enterprise policy

chrome/browser/chromeos/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/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 assert(is_chromeos)
@@ skipping 903 matching lines @@
     "net/network_portal_detector_impl.cc",
     "net/network_portal_detector_impl.h",
     "net/network_portal_detector_test_impl.cc",
     "net/network_portal_detector_test_impl.h",
     "net/network_portal_notification_controller.cc",
     "net/network_portal_notification_controller.h",
     "net/network_portal_web_dialog.cc",
     "net/network_portal_web_dialog.h",
     "net/network_state_notifier.cc",
     "net/network_state_notifier.h",
+    "net/network_throttling_observer.cc",
+    "net/network_throttling_observer.h",
     "net/shill_error.cc",
     "net/shill_error.h",
     "net/wake_on_wifi_connection_observer.cc",
     "net/wake_on_wifi_connection_observer.h",
     "net/wake_on_wifi_manager.cc",
     "net/wake_on_wifi_manager.h",
     "note_taking_app_utils.cc",
     "note_taking_app_utils.h",
     "options/cert_library.cc",
     "options/cert_library.h",
@@ skipping 526 matching lines @@
     "login/users/multi_profile_user_controller_unittest.cc",
     "login/users/user_manager_unittest.cc",
     "login/users/wallpaper/wallpaper_manager_unittest.cc",
     "mobile/mobile_activator_unittest.cc",
     "mobile_config_unittest.cc",
     "net/cert_verify_proc_chromeos_unittest.cc",
     "net/client_cert_store_chromeos_unittest.cc",
     "net/network_portal_detector_impl_unittest.cc",
     "net/network_portal_notification_controller_unittest.cc",
     "net/network_state_notifier_unittest.cc",
+    "net/network_throttling_observer_unittest.cc",
     "net/wake_on_wifi_manager_unittest.cc",
     "options/network_property_ui_data_unittest.cc",
     "ownership/fake_owner_settings_service.cc",
     "ownership/fake_owner_settings_service.h",
     "ownership/owner_settings_service_chromeos_unittest.cc",
     "policy/affiliated_cloud_policy_invalidator_unittest.cc",
     "policy/affiliated_invalidation_service_provider_impl_unittest.cc",
     "policy/android_management_client_unittest.cc",
     "policy/auto_enrollment_client_unittest.cc",
     "policy/bluetooth_policy_handler_unittest.cc",
@@ skipping 133 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }