Cronet: Use stale DNS cache entries experimentally.

components/cronet/ios/BUILD.gn

 # Copyright 2015 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/buildflag_header.gni")
 import("//build/config/ios/rules.gni")
 import("//build/config/mac/symbols.gni")
 import("//build/mac/tweak_info_plist.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
@@ skipping 22 matching lines @@
     "//components/metrics:metrics",
     "//components/metrics/proto:proto",
     "//components/prefs:prefs",
     "//net",
     "//url",
   ]
 
   sources = [
     "../histogram_manager.cc",
     "../histogram_manager.h",
+    "../stale_host_resolver.cc",
+    "../stale_host_resolver.h",
     "../url_request_context_config.cc",
     "../url_request_context_config.h",
     "cronet_bidirectional_stream.cc",
     "cronet_bidirectional_stream.h",
     "cronet_c_for_grpc.cc",
     "cronet_c_for_grpc.h",
     "cronet_environment.cc",
     "cronet_environment.h",
   ]
 
@@ skipping 66 matching lines @@
     "//net:simple_quic_tools",
     "//net:test_support",
     "//third_party/icu",
   ]
 }
 
 test("cronet_unittests") {
   sources = [
     "//components/cronet/histogram_manager_unittest.cc",
     "//components/cronet/run_all_unittests.cc",
+    "//components/cronet/stale_host_resolver_unittest.cc",
     "//components/cronet/url_request_context_config_unittest.cc",
   ]
 
   deps = [
     ":cronet_sources",
     "//base",
     "//base/test:test_support",
     "//components/metrics",
     "//net",
     "//testing/gtest",
@@ skipping 38 matching lines @@
     ]
   }
 
   group("cronet_package") {
     deps = [
       ":cronet_package_copy",
       ":generate_license",
     ]
   }
 }