[Android] Generate scripts at build time to run android tests.

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/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
 import("//url/config.gni")
 import("//testing/test.gni")
@@ skipping 1333 matching lines @@
     if (is_android) {
       sources -= [
         # See bug http://crbug.com/344533.
         "disk_cache/blockfile/index_table_v3_unittest.cc",
 
         # No res_ninit() et al on Android, so this doesn't make a lot of
         # sense.
         "dns/dns_config_service_posix_unittest.cc",
       ]
       deps += [ ":net_test_jni_headers" ]
+      isolate_file = "net_unittests.isolate"
     }
 
     if (v8_use_external_startup_data) {
       deps += [ "//gin" ]
     }
 
     if (!use_nss_certs) {
       sources -= [
         "cert/nss_cert_database_unittest.cc",
         "ssl/client_cert_store_nss_unittest.cc",
@@ skipping 249 matching lines @@
   } else {
     sources -= [ "proxy/proxy_resolver_perftest.cc" ]
   }
 
   if (is_win && icu_use_data_file) {
     # This is needed to trigger the dll copy step on windows.
     # TODO(mark): Specifying this here shouldn't be necessary.
     deps += [ "//third_party/icu:icudata" ]
   }
 }