Fix include guards for QUIC files.

net/tools/quic/quic_simple_per_connection_packet_writer.h

Index: net/tools/quic/quic_simple_per_connection_packet_writer.h
diff --git a/net/tools/quic/quic_simple_per_connection_packet_writer.h b/net/tools/quic/quic_simple_per_connection_packet_writer.h
index b61e8a71ed9c06d09fc46b253969128cb0554b7e..4c6710ce2c252dec6685c69b0ef015ecea1e26e6 100644
--- a/net/tools/quic/quic_simple_per_connection_packet_writer.h
+++ b/net/tools/quic/quic_simple_per_connection_packet_writer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_QUIC_TOOLS_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_
-#define NET_QUIC_TOOLS_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_
+#ifndef NET_TOOLS_QUIC_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_
+#define NET_TOOLS_QUIC_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_
 
 #include <stddef.h>
 
@@ -57,4 +57,4 @@ class QuicSimplePerConnectionPacketWriter : public QuicPacketWriter {
 
 }  // namespace net
 
-#endif  // NET_QUIC_TOOLS_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_
+#endif  // NET_TOOLS_QUIC_QUIC_SIMPLE_PER_CONNECTION_PACKET_WRITER_H_