Add components/network_session_configurator.

components/network_session_configurator/BUILD.gn

+# Copyright 2016 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.
+
+# GYP version:
+# components/components.gyp:network_session_configurator
+source_set("network_session_configurator") {
+  sources = [
+    "network_session_configurator.cc",
+    "network_session_configurator.h",
+  ]
+
+  public_deps = [
+    ":switches",
+    "//base",
+    "//net",
+  ]
+
+  deps = [
+    "//components/data_reduction_proxy/core/common",
+    "//components/variations",
+    "//components/version_info",
+  ]
+}
+
+# GYP version:
+# components/components.gyp:network_session_configurator_switches
+source_set("switches") {
+  sources = [
+    "switches.cc",
+    "switches.h",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "network_session_configurator_unittest.cc",
+  ]
+  deps = [
+    ":network_session_configurator",
+    "//base/test:test_support",
+    "//components/variations:variations",
+    "//testing/gtest",
+  ]
+}