Fix AltSvcVersionSelection tests when network partitioning is enabled.

These tests were setting a NetworkIsolationKey for a simulated
received alternative service header, but not on the request that it was
intended to affect.

Bug: 969893
Change-Id: Id7eaa270e48db4303aca58b0536f7463398cc507
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2595827Reviewed-by: David Schinazi <dschinazi@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#838001}

net/http/http_stream_factory_job_controller_unittest.cc

@@ -2953,11 +2953,12 @@ void HttpStreamFactoryJobControllerTest::TestAltSvcVersionSelection(
   HttpRequestInfo request_info;
   request_info.method = "GET";
   request_info.url = GURL("https://example.com");
-  Initialize(request_info);
-  url::SchemeHostPort origin(request_info.url);
   NetworkIsolationKey network_isolation_key(
       SchemefulSite(GURL("https://example.com")),
       SchemefulSite(GURL("https://example.com")));
+  request_info.network_isolation_key = network_isolation_key;
+  Initialize(request_info);
+  url::SchemeHostPort origin(request_info.url);
   scoped_refptr<HttpResponseHeaders> headers(
       base::MakeRefCounted<HttpResponseHeaders>(""));
   headers->AddHeader("alt-svc", alt_svc_header);