Add chrome perf tests and sniffer to GN build.

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("//url/config.gni")
 
 # TODO(cjhopman): //build/config/android/rules.gni also imports grit_rule.gni.
@@ skipping 662 matching lines @@
     "test/spawned_test_server/base_test_server.h",
     "test/spawned_test_server/local_test_server_posix.cc",
     "test/spawned_test_server/local_test_server_win.cc",
     "test/spawned_test_server/local_test_server.cc",
     "test/spawned_test_server/local_test_server.h",
     "test/spawned_test_server/remote_test_server.cc",
     "test/spawned_test_server/remote_test_server.h",
     "test/spawned_test_server/spawned_test_server.h",
     "test/spawned_test_server/spawner_communicator.cc",
     "test/spawned_test_server/spawner_communicator.h",
+    "test/url_request/url_request_failed_job.cc",
+    "test/url_request/url_request_failed_job.h",
+    "test/url_request/url_request_mock_http_job.cc",
+    "test/url_request/url_request_mock_http_job.h",
     "url_request/test_url_fetcher_factory.cc",
     "url_request/test_url_fetcher_factory.h",
     "url_request/test_url_request_interceptor.cc",
     "url_request/test_url_request_interceptor.h",
     "url_request/url_request_test_util.cc",
     "url_request/url_request_test_util.h",
   ]
 
   configs += [ ":net_win_size_truncation" ]
 
@@ skipping 686 matching lines @@
   sources = [ "quic/quic_server_bin.cc" ]
   deps = [
     ":quic_tools",
     ":net",
     "//base",
     "//third_party/boringssl",
   ]
 }
 
 }  # !is_android