Remove inability to call QuicSimpleServerPacketWriter::WritePacket directly

net/tools/quic/quic_simple_server_packet_writer.h

Index: net/tools/quic/quic_simple_server_packet_writer.h
diff --git a/net/tools/quic/quic_simple_server_packet_writer.h b/net/tools/quic/quic_simple_server_packet_writer.h
index 3a6b562d63976871e1c46934f965e61f3f1b473a..598e35f96f496121f69412cba8f002129fc350c7 100644
--- a/net/tools/quic/quic_simple_server_packet_writer.h
+++ b/net/tools/quic/quic_simple_server_packet_writer.h
@@ -33,15 +33,19 @@ class QuicSimpleServerPacketWriter : public QuicPacketWriter {
                                QuicBlockedWriterInterface* blocked_writer);
   ~QuicSimpleServerPacketWriter() override;
 
-  // Use this method to write packets rather than WritePacket:
-  // QuicSimpleServerPacketWriter requires a callback to exist for every
-  // write, which will be called once the write completes.
-  virtual WriteResult WritePacketWithCallback(const char* buffer,
-                                              size_t buf_len,
-                                              const IPAddress& self_address,
-                                              const IPEndPoint& peer_address,
-                                              PerPacketOptions* options,
-                                              WriteCallback callback);
+  // Wraps WritePacket, and ensures that |callback| is run on successful write.
+  WriteResult WritePacketWithCallback(const char* buffer,
+                                      size_t buf_len,
+                                      const IPAddress& self_address,
+                                      const IPEndPoint& peer_address,
+                                      PerPacketOptions* options,
+                                      WriteCallback callback);
+
+  WriteResult WritePacket(const char* buffer,
+                          size_t buf_len,
+                          const IPAddress& self_address,
+                          const IPEndPoint& peer_address,
+                          PerPacketOptions* options) override;
 
   void OnWriteComplete(int rv);
 
@@ -51,14 +55,6 @@ class QuicSimpleServerPacketWriter : public QuicPacketWriter {
   void SetWritable() override;
   QuicByteCount GetMaxPacketSize(const IPEndPoint& peer_address) const override;
 
- protected:
-  // Do not call WritePacket on its own -- use WritePacketWithCallback
-  WriteResult WritePacket(const char* buffer,
-                          size_t buf_len,
-                          const IPAddress& self_address,
-                          const IPEndPoint& peer_address,
-                          PerPacketOptions* options) override;
-
  private:
   UDPServerSocket* socket_;