Remove QuicSpdySession::OnPriorityUpdateForPushStream().

Push is not implemented in gQUIC or HTTP/3.

PiperOrigin-RevId: 490240989

quiche/quic/core/http/quic_receive_control_stream.cc

diff --git a/quiche/quic/core/http/quic_receive_control_stream.cc b/quiche/quic/core/http/quic_receive_control_stream.cc
index c0a76af..046507b 100644
--- a/quiche/quic/core/http/quic_receive_control_stream.cc
+++ b/quiche/quic/core/http/quic_receive_control_stream.cc
@@ -163,8 +163,7 @@
       return spdy_session_->OnPriorityUpdateForRequestStream(
           frame.prioritized_element_id, urgency);
     } else {
-      return spdy_session_->OnPriorityUpdateForPushStream(
-          frame.prioritized_element_id, urgency);
+      return true;
     }
   }
 

quiche/quic/core/http/quic_spdy_session.cc

diff --git a/quiche/quic/core/http/quic_spdy_session.cc b/quiche/quic/core/http/quic_spdy_session.cc
index 27aa38a..66e5b8e 100644
--- a/quiche/quic/core/http/quic_spdy_session.cc
+++ b/quiche/quic/core/http/quic_spdy_session.cc
@@ -675,12 +675,6 @@
   return true;
 }
 
-bool QuicSpdySession::OnPriorityUpdateForPushStream(QuicStreamId /*push_id*/,
-                                                    int /*urgency*/) {
-  // TODO(b/147306124): Implement PRIORITY_UPDATE frames for pushed streams.
-  return true;
-}
-
 size_t QuicSpdySession::ProcessHeaderData(const struct iovec& iov) {
   QUIC_BUG_IF(quic_bug_12477_4, destruction_indicator_ != 123456789)
       << "QuicSpdyStream use after free. " << destruction_indicator_

quiche/quic/core/http/quic_spdy_session.h

diff --git a/quiche/quic/core/http/quic_spdy_session.h b/quiche/quic/core/http/quic_spdy_session.h
index 0cfb629..e1cf902 100644
--- a/quiche/quic/core/http/quic_spdy_session.h
+++ b/quiche/quic/core/http/quic_spdy_session.h
@@ -185,10 +185,6 @@
   // stream.  Returns false and closes connection if |stream_id| is invalid.
   bool OnPriorityUpdateForRequestStream(QuicStreamId stream_id, int urgency);
 
-  // Called when an HTTP/3 PRIORITY_UPDATE frame has been received for a push
-  // stream.  Returns false and closes connection if |push_id| is invalid.
-  bool OnPriorityUpdateForPushStream(QuicStreamId push_id, int urgency);
-
   // Called when an HTTP/3 ACCEPT_CH frame has been received.
   // This method will only be called for client sessions.
   virtual void OnAcceptChFrame(const AcceptChFrame& /*frame*/) {}