Create a QuicChromiumClientStream::Handle class for allowing a stream

net/quic/chromium/bidirectional_stream_quic_impl.h

Index: net/quic/chromium/bidirectional_stream_quic_impl.h
diff --git a/net/quic/chromium/bidirectional_stream_quic_impl.h b/net/quic/chromium/bidirectional_stream_quic_impl.h
index e9f58509caf02dcfa96bfe3b9403bad5a9394ce7..e8f5cfe0ec6857735a09b642a792495c9aa61127 100644
--- a/net/quic/chromium/bidirectional_stream_quic_impl.h
+++ b/net/quic/chromium/bidirectional_stream_quic_impl.h
@@ -78,7 +78,7 @@ class NET_EXPORT_PRIVATE BidirectionalStreamQuicImpl
   void ResetStream();
 
   const std::unique_ptr<QuicChromiumClientSession::Handle> session_;
-  QuicChromiumClientStream* stream_;  // Non-owning.
+  std::unique_ptr<QuicChromiumClientStream::Handle> stream_;
 
   const BidirectionalStreamRequestInfo* request_info_;
   BidirectionalStreamImpl::Delegate* delegate_;