Remove QuicChromiumClientStream::Delegate in favor of async methods.

net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc

Index: net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc
diff --git a/net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc b/net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc
index d4c0d028ca871c69d925203d9496bc12dc56bb66..bf211c13d0552df38cea25ddcf7d39b326c8fe49 100644
--- a/net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc
+++ b/net/quic/chromium/bidirectional_stream_quic_impl_unittest.cc
@@ -1598,8 +1598,9 @@ TEST_P(BidirectionalStreamQuicImplTest, SessionClosedBeforeReadData) {
   delegate->SendData(buf, buf->size(), false);
   base::RunLoop().RunUntilIdle();
 
-  EXPECT_THAT(delegate->ReadData(cb.callback()), IsError(ERR_UNEXPECTED));
-  EXPECT_THAT(delegate->error(), IsError(ERR_UNEXPECTED));
+  EXPECT_THAT(delegate->ReadData(cb.callback()),
+              IsError(ERR_QUIC_PROTOCOL_ERROR));
+  EXPECT_THAT(delegate->error(), IsError(ERR_QUIC_PROTOCOL_ERROR));
   EXPECT_EQ(0, delegate->on_data_read_count());
   EXPECT_EQ(0, delegate->on_data_sent_count());
   EXPECT_EQ(kProtoQUIC, delegate->GetProtocol());