Create a QuicChromiumClientStream::Handle class for allowing a stream

net/quic/chromium/quic_chromium_client_session.cc

Index: net/quic/chromium/quic_chromium_client_session.cc
diff --git a/net/quic/chromium/quic_chromium_client_session.cc b/net/quic/chromium/quic_chromium_client_session.cc
index 6d46a328b9b570d5c18509b00c948e12264835ec..4c70e143387ff4fe0681128b4877d521f9fea755 100644
--- a/net/quic/chromium/quic_chromium_client_session.cc
+++ b/net/quic/chromium/quic_chromium_client_session.cc
@@ -301,13 +301,14 @@ int QuicChromiumClientSession::Handle::RequestStream(
   return stream_request_->StartRequest(callback);
 }
 
-QuicChromiumClientStream* QuicChromiumClientSession::Handle::ReleaseStream(
+std::unique_ptr<QuicChromiumClientStream::Handle>
+QuicChromiumClientSession::Handle::ReleaseStream(
     QuicChromiumClientStream::Delegate* delegate) {
   DCHECK(stream_request_);
 
-  auto* stream = stream_request_->ReleaseStream(delegate);
+  auto handle = stream_request_->ReleaseStream(delegate);
   stream_request_.reset();
-  return stream;
+  return handle;
 }
 
 int QuicChromiumClientSession::Handle::WaitForHandshakeConfirmation(
@@ -376,14 +377,13 @@ int QuicChromiumClientSession::StreamRequest::StartRequest(
   return rv;
 }
 
-QuicChromiumClientStream*
+std::unique_ptr<QuicChromiumClientStream::Handle>
 QuicChromiumClientSession::StreamRequest::ReleaseStream(
     QuicChromiumClientStream::Delegate* delegate) {
   DCHECK(stream_);
   QuicChromiumClientStream* stream = stream_;
   stream_ = nullptr;
-  stream->SetDelegate(delegate);
-  return stream;
+  return stream->CreateHandle(delegate);
 }
 
 void QuicChromiumClientSession::StreamRequest::OnRequestCompleteSuccess(