[net] Add WifiPhyMode to SystemProfile

net/base/net_util.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.
 
 #ifndef NET_BASE_NET_UTIL_H_
 #define NET_BASE_NET_UTIL_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 498 matching lines @@
 };
 
 typedef std::vector<NetworkInterface> NetworkInterfaceList;
 
 // Returns list of network interfaces except loopback interface. If an
 // interface has more than one address, a separate entry is added to
 // the list for each address.
 // Can be called only on a thread that allows IO.
 NET_EXPORT bool GetNetworkList(NetworkInterfaceList* networks);
 
+// General category of the IEEE 802.11 (wifi) physical layer operating mode.
+enum WifiPhyMode {
+  // No wifi support or no associated AP.
+  WIFI_PHY_MODE_NONE,
+  // An obsolete modes introduced by the original 802.11, e.g. IR, FHSS,
+  WIFI_PHY_MODE_ANCIENT,
+  // 802.11a, OFDM-based rates.
+  WIFI_PHY_MODE_A,
+  // 802.11b, DSSS or HR DSSS.
+  WIFI_PHY_MODE_B,
+  // 802.11g, same rates as 802.11a but compatible with 802.11b.
+  WIFI_PHY_MODE_G,
+  // 802.11n, HT rates.
+  WIFI_PHY_MODE_N,
+  // Unclassified mode or failure to identify.
+  WIFI_PHY_MODE_UNKNOWN
+};
+
+// Characterize the PHY mode of the currently associated access point.
+// Currently only available on OS_WIN.
+NET_EXPORT WifiPhyMode GetWifiPhyMode();
+
 }  // namespace net
 
 #endif  // NET_BASE_NET_UTIL_H_