Fix StreamFailBeforeReadIsExecutedOnNetworkThread flake

components/grpc_support/bidirectional_stream_unittest.cc

Index: components/grpc_support/bidirectional_stream_unittest.cc
diff --git a/components/grpc_support/bidirectional_stream_unittest.cc b/components/grpc_support/bidirectional_stream_unittest.cc
index 3ef83ffe9c1cf2fc7e768ebc82efc25078a10cdb..84e5cb6c50c1ddef05c3fb9c2075bb9907b394f3 100644
--- a/components/grpc_support/bidirectional_stream_unittest.cc
+++ b/components/grpc_support/bidirectional_stream_unittest.cc
@@ -555,7 +555,8 @@ TEST_P(BidirectionalStreamTest, StreamFailBeforeReadIsExecutedOnNetworkThread) {
                              "POST", &kTestHeadersArray, false);
   test.BlockForDone();
   ASSERT_EQ(TestBidirectionalStreamCallback::ON_FAILED, test.response_step);
-  ASSERT_EQ(net::ERR_QUIC_PROTOCOL_ERROR, test.net_error);
+  ASSERT_TRUE(test.net_error == net::ERR_QUIC_PROTOCOL_ERROR ||
+              test.net_error == net::ERR_CONNECTION_REFUSED);
   bidirectional_stream_destroy(test.stream);
 }