Deprecate FLAGS_quic_read_packets_full_recvmmsg.

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index 809ebd8d5d7a1d2a9bf2a42fdd042e55124085c7..bbf9630da5ed10a4f616d51b5c0e8459f67d44c4 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -113,8 +113,7 @@ QuicSession::QuicSession(QuicConnection* connection, const QuicConfig& config)
                        perspective(),
                        kMinimumFlowControlSendWindow,
                        config_.GetInitialSessionFlowControlWindowToSend(),
-                       false),
-      has_pending_handshake_(false) {}
+                       false) {}
 
 void QuicSession::Initialize() {
   connection_->set_visitor(visitor_shim_.get());
@@ -259,9 +258,6 @@ void QuicSession::OnCanWrite() {
       return;
     }
     QuicStreamId stream_id = write_blocked_streams_.PopFront();
-    if (stream_id == kCryptoStreamId) {
-      has_pending_handshake_ = false;  // We just popped it.
-    }
     ReliableQuicStream* stream = GetStream(stream_id);
     if (stream != nullptr && !stream->flow_controller()->IsBlocked()) {
       // If the stream can't write all bytes it'll re-add itself to the blocked
@@ -282,7 +278,7 @@ bool QuicSession::WillingAndAbleToWrite() const {
 }
 
 bool QuicSession::HasPendingHandshake() const {
-  return has_pending_handshake_;
+  return write_blocked_streams_.crypto_stream_blocked();
 }
 
 bool QuicSession::HasOpenDynamicStreams() const {
@@ -748,14 +744,6 @@ void QuicSession::MarkConnectionLevelWriteBlocked(QuicStreamId id,
   }
 #endif
 
-  if (id == kCryptoStreamId) {
-    DCHECK(!has_pending_handshake_);
-    has_pending_handshake_ = true;
-    // TODO(jar): Be sure to use the highest priority for the crypto stream,
-    // perhaps by adding a "special" priority for it that is higher than
-    // kHighestPriority.
-    priority = kHighestPriority;
-  }
   write_blocked_streams_.AddStream(id, priority);
 }