Hook up ProfileIOData's URLRequestContext to a NetworkService.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 2acbd7f409b42cb9019471f45418ed1c43bf8e53..c291f111cc4135bc54e3252d23910698804c6c5c 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1350,6 +1350,7 @@ test("browser_tests") {
       "../browser/net/errorpage_browsertest.cc",
       "../browser/net/ftp_browsertest.cc",
       "../browser/net/load_timing_browsertest.cc",
+      "../browser/net/network_context_configuration_browsertest.cc",
       "../browser/net/nqe/ui_network_quality_estimator_service_browsertest.cc",
       "../browser/net/nqe/ui_network_quality_estimator_service_test_util.cc",
       "../browser/net/nqe/ui_network_quality_estimator_service_test_util.h",
@@ -1357,7 +1358,6 @@ test("browser_tests") {
       "../browser/net/predictor_browsertest.cc",
       "../browser/net/proxy_browsertest.cc",
       "../browser/net/sdch_browsertest.cc",
-      "../browser/net/system_network_context_manager_browsertest.cc",
       "../browser/net/websocket_browsertest.cc",
       "../browser/ntp_snippets/content_suggestions_service_factory_browsertest.cc",
       "../browser/ntp_tiles/ntp_tiles_browsertest.cc",
@@ -3563,9 +3563,7 @@ test("unit_tests") {
       "../browser/offline_pages/test_request_coordinator_builder.h",
     ]
     if (is_android) {
-      sources += [
-        "../browser/offline_pages/android/prerendering_offliner_unittest.cc",
-      ]
+      sources += [ "../browser/offline_pages/android/prerendering_offliner_unittest.cc" ]
     }
     deps += [
       "//components/offline_pages/content/background_loader:test_support",