Expose a static configuration value for the host to use for URLRequestTestHTTP tests.

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index c296745969d1bb288c3cde713ac2bf6c9ca97439..07d6b77f44849b9b02172ecd98abbef0bf2fc7da 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -504,3 +504,15 @@ net::NetworkDelegate::AuthRequiredResponse TestNetworkDelegate::OnAuthRequired(
       kStageBeforeRedirect;  // a delegate can trigger a redirection
   return net::NetworkDelegate::AUTH_REQUIRED_RESPONSE_NO_ACTION;
 }
+
+namespace {
+std::string g_url_request_test_http_host("127.0.0.1");
+}  // namespace
+
+void set_url_request_test_http_host(const std::string& host) {
+  g_url_request_test_http_host = host;
+}
+
+const std::string& url_request_test_http_host() {
+  return g_url_request_test_http_host;
+}