Cleanup: remove BlockedWriterInterface from QuicPacketWriter.

net/tools/quic/quic_dispatcher_test.cc

Index: net/tools/quic/quic_dispatcher_test.cc
diff --git a/net/tools/quic/quic_dispatcher_test.cc b/net/tools/quic/quic_dispatcher_test.cc
index 5e4726ff316478eef79888f83cba33f58fd38533..4434b5a4ae6a1340ea49befae82ed55b7f66e5e8 100644
--- a/net/tools/quic/quic_dispatcher_test.cc
+++ b/net/tools/quic/quic_dispatcher_test.cc
@@ -284,13 +284,12 @@ class BlockingWriter : public QuicPacketWriterWrapper {
       const char* buffer,
       size_t buf_len,
       const IPAddressNumber& self_address,
-      const IPEndPoint& peer_address,
-      QuicBlockedWriterInterface* blocked_writer) OVERRIDE {
+      const IPEndPoint& peer_address) OVERRIDE {
     if (write_blocked_) {
       return WriteResult(WRITE_STATUS_BLOCKED, EAGAIN);
     } else {
       return QuicPacketWriterWrapper::WritePacket(
-          buffer, buf_len, self_address, peer_address, blocked_writer);
+          buffer, buf_len, self_address, peer_address);
     }
   }