Fix include guards for QUIC files.

net/quic/core/quic_sent_packet_manager_interface.h

Index: net/quic/core/quic_sent_packet_manager_interface.h
diff --git a/net/quic/core/quic_sent_packet_manager_interface.h b/net/quic/core/quic_sent_packet_manager_interface.h
index b1860e4d008f3a1b77df2ce546947d6e5e836224..b68da8fb8adb16249ed2f0462d450edcf4ac5d54 100644
--- a/net/quic/core/quic_sent_packet_manager_interface.h
+++ b/net/quic/core/quic_sent_packet_manager_interface.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_SENT_PACKET_MANAGER_INTERFACE_H_
-#define NET_QUIC_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_
+#ifndef NET_QUIC_CORE_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_
+#define NET_QUIC_CORE_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_
 
 #include "base/macros.h"
 #include "net/base/net_export.h"
@@ -198,4 +198,4 @@ class NET_EXPORT_PRIVATE QuicSentPacketManagerInterface {
 
 }  // namespace net
 
-#endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_
+#endif  // NET_QUIC_CORE_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_