Make a QuicDefaultPacketWriter method virtual, and check member variable directly. No behavior chan…

net/tools/quic/quic_default_packet_writer.cc

Index: net/tools/quic/quic_default_packet_writer.cc
diff --git a/net/tools/quic/quic_default_packet_writer.cc b/net/tools/quic/quic_default_packet_writer.cc
index 66a6440c535664c237ceca113a00af0991fb141e..e1d6fbf915030fb62691693942b4c77d7a519949 100644
--- a/net/tools/quic/quic_default_packet_writer.cc
+++ b/net/tools/quic/quic_default_packet_writer.cc
@@ -18,7 +18,7 @@ WriteResult QuicDefaultPacketWriter::WritePacket(const char* buffer,
                                                  const IPAddress& self_address,
                                                  const IPEndPoint& peer_address,
                                                  PerPacketOptions* options) {
-  DCHECK(!IsWriteBlocked());
+  DCHECK(!write_blocked_);
   DCHECK(nullptr == options)
       << "QuicDefaultPacketWriter does not accept any options.";
   WriteResult result = QuicSocketUtils::WritePacket(fd_, buffer, buf_len,
@@ -46,4 +46,8 @@ QuicByteCount QuicDefaultPacketWriter::GetMaxPacketSize(
   return kMaxPacketSize;
 }
 
+void QuicDefaultPacketWriter::set_write_blocked(bool is_blocked) {
+  write_blocked_ = is_blocked;
+}
+
 }  // namespace net