Update base/sys_byteorder.h comment, missed in previous CL.

base/sys_byteorder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// This is a convenience header to pull in the platform-specific
-// headers that define functions for byte-order conversion,
-// particularly: ntohs(), htons(), ntohl(), htonl(). Prefer including
-// this file instead of directly writing the #if / #else, since it
-// avoids duplicating the platform-specific selections.
-// This header also provides ntohll() and htonll() for byte-order conversion
-// for 64-bit integers.
+// This header defines cross-platform ByteSwap() implementations for 16, 32 and
+// 64-bit values, and NetToHostXX() / HostToNextXX() functions equivalent to
+// the traditional ntohX() and htonX() functions.
+// Use the functions defined here rather than using the platform-specific
+// functions directly.
 
 #ifndef BASE_SYS_BYTEORDER_H_
 #define BASE_SYS_BYTEORDER_H_
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <winsock2.h>
 #else
@@ skipping 94 matching lines @@
   return ByteSwap(x);
 #else
   return x;
 #endif
 }
 
 }  // namespace base
 
 
 #endif  // BASE_SYS_BYTEORDER_H_