Fix include guards for QUIC files.

net/quic/chromium/quic_chromium_packet_writer.h

Index: net/quic/chromium/quic_chromium_packet_writer.h
diff --git a/net/quic/chromium/quic_chromium_packet_writer.h b/net/quic/chromium/quic_chromium_packet_writer.h
index d4e9dc8d43318cf2072965e9fc47d640e63183c4..09e03fd16dedc353b710344d170832f7a7088d73 100644
--- a/net/quic/chromium/quic_chromium_packet_writer.h
+++ b/net/quic/chromium/quic_chromium_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_QUIC_CHROMIUM_PACKET_WRITER_H_
-#define NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_
+#ifndef NET_QUIC_CHROMIUM_QUIC_CHROMIUM_PACKET_WRITER_H_
+#define NET_QUIC_CHROMIUM_QUIC_CHROMIUM_PACKET_WRITER_H_
 
 #include <stddef.h>
 
@@ -84,4 +84,4 @@ class NET_EXPORT_PRIVATE QuicChromiumPacketWriter : public QuicPacketWriter {
 
 }  // namespace net
 
-#endif  // NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_
+#endif  // NET_QUIC_CHROMIUM_QUIC_CHROMIUM_PACKET_WRITER_H_