Remove QuicChromiumClientStream::Delegate in favor of async methods.

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 a2c88c86f3828005ac280f43761f516da4deafe1..3e47b88df1f3294b7a9547e6607672aad77fc662 100644
--- a/net/quic/chromium/quic_chromium_client_session.cc
+++ b/net/quic/chromium/quic_chromium_client_session.cc
@@ -305,11 +305,10 @@ int QuicChromiumClientSession::Handle::RequestStream(
 }
 
 std::unique_ptr<QuicChromiumClientStream::Handle>
-QuicChromiumClientSession::Handle::ReleaseStream(
-    QuicChromiumClientStream::Delegate* delegate) {
+QuicChromiumClientSession::Handle::ReleaseStream() {
   DCHECK(stream_request_);
 
-  auto handle = stream_request_->ReleaseStream(delegate);
+  auto handle = stream_request_->ReleaseStream();
   stream_request_.reset();
   return handle;
 }
@@ -381,12 +380,11 @@ int QuicChromiumClientSession::StreamRequest::StartRequest(
 }
 
 std::unique_ptr<QuicChromiumClientStream::Handle>
-QuicChromiumClientSession::StreamRequest::ReleaseStream(
-    QuicChromiumClientStream::Delegate* delegate) {
+QuicChromiumClientSession::StreamRequest::ReleaseStream() {
   DCHECK(stream_);
   QuicChromiumClientStream* stream = stream_;
   stream_ = nullptr;
-  return stream->CreateHandle(delegate);
+  return stream->CreateHandle();
 }
 
 void QuicChromiumClientSession::StreamRequest::OnRequestCompleteSuccess(