[net] Add WifiPhyMode to SystemProfile

chrome/common/metrics/proto/system_profile.proto

 // 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.
 //
 // Stores information about the user's brower and system configuration.
 // The system configuration fields are recorded once per client session.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
@@ skipping 136 matching lines @@
       // The GL_RENDERER string. An example of a gl_renderer string is 
       // "PowerVR SGX 540". "" if we are not using OpenGL.
       optional string gl_renderer = 7;
     }
     optional Graphics gpu = 8;
   }
   optional Hardware hardware = 6;
 
   // Information about the network connection.
   message Network {
-    // Set to true if there was a network change during the lifetime of the log.
+    // Set to true if connection_type changed during the lifetime of the log.
     optional bool connection_type_is_ambiguous = 1;
 
     // See net::NetworkChangeNotifier::ConnectionType.
     enum ConnectionType {
       CONNECTION_UNKNOWN = 0;
       CONNECTION_ETHERNET = 1;
       CONNECTION_WIFI = 2;
       CONNECTION_2G = 3;
       CONNECTION_3G = 4;
       CONNECTION_4G = 5;
     }
+    // The connection type according to NetworkChangeNotifier.
     optional ConnectionType connection_type = 2;
+
+    // Set to true if wifi_phy_layer_protocol changed during the lifetime of the log.
+    optional bool wifi_phy_layer_protocol_is_ambiguous = 3;
+
+    // See net::WifiPHYLayerProtocol.
+    enum WifiPHYLayerProtocol {
+      WIFI_PHY_LAYER_PROTOCOL_NONE = 0;
+      WIFI_PHY_LAYER_PROTOCOL_ANCIENT = 1;
+      WIFI_PHY_LAYER_PROTOCOL_A = 2;
+      WIFI_PHY_LAYER_PROTOCOL_B = 3;
+      WIFI_PHY_LAYER_PROTOCOL_G = 4;
+      WIFI_PHY_LAYER_PROTOCOL_N = 5;
+      WIFI_PHY_LAYER_PROTOCOL_UNKNOWN = 6;
+    }
+    // The physical layer mode of the associated wifi access point, if any.
+    optional WifiPHYLayerProtocol wifi_phy_layer_protocol = 4;
   }
   optional Network network = 13;
 
   // Information on the Google Update install that is managing this client.
   message GoogleUpdate {
     // Whether the Google Update install is system-level or user-level.
     optional bool is_system_install = 1;
 
     // The date at which Google Update last started performing an automatic
     // update check, in seconds since the Unix epoch.
@@ skipping 161 matching lines @@
     // The name of the field trial, as a 32-bit identifier.
     // Currently, the identifier is a hash of the field trial's name.
     optional fixed32 name_id = 1;
 
     // The user's group within the field trial, as a 32-bit identifier.
     // Currently, the identifier is a hash of the group's name.
     optional fixed32 group_id = 2;
   }
   repeated FieldTrial field_trial = 9;
 }