Cronet: Use stale DNS cache entries experimentally.

components/cronet.gypi

 # 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.
 
 {
   'conditions': [
     ['OS=="android"', {
       'targets': [
         {
           'target_name': 'cronet_jni_headers',
@@ skipping 743 matching lines @@
           'type': 'static_library',
           'sources': [
             'cronet/ios/Cronet.h',
             'cronet/ios/Cronet.mm',
             'cronet/ios/cronet_bidirectional_stream.h',
             'cronet/ios/cronet_bidirectional_stream.cc',
             'cronet/ios/cronet_c_for_grpc.h',
             'cronet/ios/cronet_c_for_grpc.cc',
             'cronet/ios/cronet_environment.cc',
             'cronet/ios/cronet_environment.h',
+            'cronet/stale_host_resolver.cc',
+            'cronet/stale_host_resolver.h',
             'cronet/url_request_context_config.cc',
             'cronet/url_request_context_config.h',
           ],
           'dependencies': [
             'cronet_version_header',
             '../base/base.gyp:base',
             '../net/net.gyp:net',
           ],
           'cflags': [
             '-fdata-sections',
@@ skipping 158 matching lines @@
                   'cronet/ios/test/cronet_bidirectional_stream_test.mm',
                   'cronet/ios/test/cronet_test_runner.mm',
                 ],
               },
             ],
           },
       ],
     }],  # OS=="ios"
   ],
 }