Remove QuicChromiumClientStream::Delegate in favor of async methods.

net/quic/chromium/quic_chromium_client_session.h

Index: net/quic/chromium/quic_chromium_client_session.h
diff --git a/net/quic/chromium/quic_chromium_client_session.h b/net/quic/chromium/quic_chromium_client_session.h
index 306224b76288382a28c965c0a1ac730c842d7afc..27405219a5d2a1d5ac833f6af111cfae6a852ed2 100644
--- a/net/quic/chromium/quic_chromium_client_session.h
+++ b/net/quic/chromium/quic_chromium_client_session.h
@@ -90,9 +90,8 @@ class NET_EXPORT_PRIVATE QuicChromiumClientSession
     int RequestStream(bool requires_confirmation,
                       const CompletionCallback& callback);
 
-    // Releases |stream_| to the caller and sets |delegate| on the handle.
-    std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream(
-        QuicChromiumClientStream::Delegate* delegate);
+    // Releases |stream_| to the caller.
+    std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream();
 
     // Sends Rst for the stream, and makes sure that future calls to
     // IsClosedStream(id) return true, which ensures that any subsequent
@@ -193,9 +192,8 @@ class NET_EXPORT_PRIVATE QuicChromiumClientSession
     // complete |callback| will be called.
     int StartRequest(const CompletionCallback& callback);
 
-    // Releases |stream_| to the caller and sets |delegate| on it.
-    std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream(
-        QuicChromiumClientStream::Delegate* delegate);
+    // Releases |stream_| to the caller.
+    std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream();
 
    private:
     friend class QuicChromiumClientSession;