Deprecate FLAGS_quic_send_push_stream_timed_out_error.

net/quic/core/quic_client_promised_info.cc

Index: net/quic/core/quic_client_promised_info.cc
diff --git a/net/quic/core/quic_client_promised_info.cc b/net/quic/core/quic_client_promised_info.cc
index 1648a2bc9d6e2e6d03c8147199d5df672580c09e..186b192c5f2658ef8511bf859879de21ff315473 100644
--- a/net/quic/core/quic_client_promised_info.cc
+++ b/net/quic/core/quic_client_promised_info.cc
@@ -26,11 +26,7 @@ QuicClientPromisedInfo::~QuicClientPromisedInfo() {}
 void QuicClientPromisedInfo::CleanupAlarm::OnAlarm() {
   DVLOG(1) << "self GC alarm for stream " << promised_->id_;
   promised_->session()->OnPushStreamTimedOut(promised_->id_);
-  if (FLAGS_quic_send_push_stream_timed_out_error) {
-    promised_->Reset(QUIC_PUSH_STREAM_TIMED_OUT);
-  } else {
-    promised_->Reset(QUIC_STREAM_CANCELLED);
-  }
+  promised_->Reset(QUIC_PUSH_STREAM_TIMED_OUT);
 }
 
 void QuicClientPromisedInfo::Init() {