DNS: Add stubs for persisting data across restarts

net/BUILD.gn

 # Copyright (c) 2013 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/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 108 matching lines @@
     "//third_party/protobuf:protobuf_lite",
     "//url:url_features",
   ]
 
   public_deps = [
     ":net_quic_proto",
     "//crypto",
     "//crypto:platform",
   ]
 
+  if (!enable_built_in_dns) {
+    sources -= [
+      "dns/address_sorter_posix.cc",
+      "dns/address_sorter_posix.h",
+    ]
+  }
+
   if (!is_nacl) {
     sources += gypi_values.net_non_nacl_sources
 
     deps += [
       "//base/third_party/dynamic_annotations",
       "//components/prefs",
       "//sdch",
       "//third_party/zlib",
     ]
 
     if (!use_kerberos) {
       sources -= [
         "http/http_auth_handler_negotiate.cc",
         "http/http_auth_handler_negotiate.h",
       ]
     }
 
     if (is_posix) {
       if (posix_avoid_mmap) {
         sources -= [ "disk_cache/blockfile/mapped_file_posix.cc" ]
       } else {
         sources -= [ "disk_cache/blockfile/mapped_file_avoid_mmap_posix.cc" ]
       }
     }
 
-    if (!enable_built_in_dns) {
-      sources -= [
-        "dns/address_sorter_posix.cc",
-        "dns/address_sorter_posix.h",
-        "dns/dns_client.cc",
-      ]
-    }
-
     if (!use_openssl_certs) {
       sources -= [
         "base/crypto_module_openssl.cc",
         "base/keygen_handler_openssl.cc",
         "base/openssl_private_key_store.h",
         "base/openssl_private_key_store_memory.cc",
         "cert/cert_database_openssl.cc",
         "cert/cert_verify_proc_openssl.cc",
         "cert/cert_verify_proc_openssl.h",
         "cert/test_root_certs_openssl.cc",
@@ skipping 1830 matching lines @@
     "url_request/url_request_fuzzer.cc",
   ]
   deps = [
     ":net_fuzzer_test_support",
     ":test_support",
     "//base",
     "//net",
   ]
   dict = "data/fuzzer_dictionaries/net_url_request_fuzzer.dict"
 }