Use SimulateNetworkServiceCrash helper instead of rewriting it.

This fixes the test flake.

Bug: 1147062
Change-Id: Iacfa443eb74420e79ffb56d770d59388cabe94b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2525767Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Lily Chen <chlily@chromium.org>
Reviewed-by: Eric Orth <ericorth@chromium.org>
Commit-Queue: Chris Fredrickson <cfredric@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825826}

content/browser/OWNERS

@@ -55,3 +55,7 @@ per-file field_trial_synchronizer.*=file://base/metrics/OWNERS
 # Cross origin opener policy.
 per-file cross_origin_opener_policy*=ahemery@chromium.org
 per-file cross_origin_opener_policy*=pmeuleman@chromium.org
+
+# Network Service.
+per-file network_service_*=file://services/network/OWNERS
+per-file network_context_*=file://services/network/OWNERS

content/browser/network_service_browsertest.cc

@@ -461,11 +461,7 @@ IN_PROC_BROWSER_TEST_F(NetworkServiceWithFirstPartySetBrowserTest,
 
   EXPECT_EQ(GetPreloadedFirstPartySetCountFromNetworkService(), 2);
 
-  mojo::Remote<network::mojom::NetworkServiceTest> network_service_test;
-  GetNetworkService()->BindTestInterface(
-      network_service_test.BindNewPipeAndPassReceiver());
-  network_service_test->SimulateCrash();
-  network_service_test.FlushForTesting();
+  SimulateNetworkServiceCrash();
 
   EXPECT_EQ(GetPreloadedFirstPartySetCountFromNetworkService(), 2);
 }