Cleanup: remove BlockedWriterInterface from QuicPacketWriter.

net/tools/quic/test_tools/packet_dropping_test_writer.cc

Index: net/tools/quic/test_tools/packet_dropping_test_writer.cc
diff --git a/net/tools/quic/test_tools/packet_dropping_test_writer.cc b/net/tools/quic/test_tools/packet_dropping_test_writer.cc
index de6b2019a6d849428585080ed33d8c7bd5d146cc..148591d0c0e502eb78b8b2a4c2115258b770b10e 100644
--- a/net/tools/quic/test_tools/packet_dropping_test_writer.cc
+++ b/net/tools/quic/test_tools/packet_dropping_test_writer.cc
@@ -78,8 +78,7 @@ WriteResult PacketDroppingTestWriter::WritePacket(
     const char* buffer,
     size_t buf_len,
     const net::IPAddressNumber& self_address,
-    const net::IPEndPoint& peer_address,
-    QuicBlockedWriterInterface* blocked_writer) {
+    const net::IPEndPoint& peer_address) {
   ReleaseOldPackets();
 
   base::AutoLock locked(config_mutex_);
@@ -132,7 +131,7 @@ WriteResult PacketDroppingTestWriter::WritePacket(
   }
 
   return QuicPacketWriterWrapper::WritePacket(
-      buffer, buf_len, self_address, peer_address, blocked_writer);
+      buffer, buf_len, self_address, peer_address);
 }
 
 bool PacketDroppingTestWriter::IsWriteBlocked() const {
@@ -170,7 +169,7 @@ QuicTime PacketDroppingTestWriter::ReleaseNextPacket() {
   // Grab the next one off the queue and send it.
   QuicPacketWriterWrapper::WritePacket(
       iter->buffer.data(), iter->buffer.length(),
-      iter->self_address, iter->peer_address, NULL);
+      iter->self_address, iter->peer_address);
   DCHECK_GE(cur_buffer_size_, iter->buffer.length());
   cur_buffer_size_ -= iter->buffer.length();
   delayed_packets_.erase(iter);